As the title already implied i'm going to make a rant about the hetalia girls. I will cover all ten of them. This will mainly be a rant covering the common problems of them.
As we all know, the females are quite rare in the universe of Hetalia. It is obvious the male cast overpowers the women. But that doesn't mean they're not necessary.
The large problem is mostly their relationships with some boys, or the use of stereotypes.
Hungary
Stereotype? Badass action girl, tomboy
Problems? She is too manly, otaku (because she likes it when Austria is like being roped durr), gets her ass owned by Austria. Has motherly affection for Italy and thats bad.
Well, with Hungary being the most popular female in the series, she gets the most love and hate. She is widely regarded as a rotten girl who reads to much r18 and loves taking pictures of her gay husband while being groped. Well she actually DOES care about her husband in other ways then groping. Yup, she does.
Her manliness, defines her as a mary sue, because apperently being motherly AND a tomboy doesn't fit in our time nowhadays. Guys this is the 21th century. Get over it. Also she stands in the way of Ausprus ( or Prusaus i don't really care how it's called sorry) or Swissaus (Ausswiss). This is not a reason for hating somebody. This is the WORST REASON of them all.
Liechtenstein
Stereotype? Shy girl, shrinking violet.
Problem? Mary sue traits, no personality, 's there for the lolifun. Likes frilly things.
Really guys? Really? I once came across a forum (don't ask me wich) about Hetalia bashing and they said that Liechtenstein was an immature girl who loved dressing her brother in pink frillies, thus harassing him. C'mon. I mean why? Get your facts straight.
Worser, she is declared mary sue because of her innoncent being, sad background and no real connection to the plot anyway. Well, first she isn't innoncent. It is showed at some point that she can handle a rifle very well, just like her brother. Her sad background can be considered Sueish, but isn't over top. I mean everyone's background is sueish/stuish if we go that way. And after all they are nations. They live forever (or something along that line). And what about the plot? She has no connection to i- WAIT A SECOND! Does Hetalia even have a plot? It's about the whole world so evryone is connected. EVERYONE!
Belarus
Stereotype? Demon maid
Problems? Yaoi cock block, again no personality, stalker of oh so innoncent Russia, mean bully...
She probably has a major hate base. She stands in the way of Russiax the world, stalks him and freightens him (dunno how to spel it), goes as far as attacking people for like no apparent reason. Yup thats Belarus in one sentence.
RAGE!!!
I..I don't ... Kn..ow..wha...t...to..say..anymo..re...
EDIT : Oh hey guys! Did you know she can smile? She can.
Ukraine
Stereotype? Ms Fanservice
Problems? BOOOOOOOBBBBBS! Whiny. BOOOOBS! Stupid. BOOOOOBS!!! Cries all the time. BOOOBBSSS!!! Hate Russia and is broke. BOOOBSS GUYS BOOOBSSSS!!!
How many time have we seen this: "OMG Ukraine is only used to still the hunger of the male part of the fanbase (that like totly dunt exist)and has like no character developement and cries all the time but it was her fault cuz she left por Ivan alone and she dusn't pay bills cuz she hates him!!! Well her 'huge tracts of lands' are maybe a bit overdone, but it still represents her 25% farming industry. At least, she has (even though it' little) a reason to have those "tracts". But that doesn't mean you should hate on her. She is actually really nice. She left Russia because of problems. Everyone has those. She still loves her brother, but her boss makes her unable to express this for him. She isn't whiny, she is really sensitive and she doesn't cry all the frikin time! And she is nice, Not Boobs.
Belgium (home country! Yay)
Stereotype? Nekomini, cat service
Problems? Intruder of holy Spamano, has a relly high annoying voice, Uses fests as a reason to wear cat ears,has also no personality besides clinging to oyabun (Spain) and getting her ass saved by England (That Londen treaty or something like that).
Guess that's it? I will no longer waste time on Yaoi interruptions so i just go further. Her voice isnlike so unnaturally high!!! Did someone hear Vocaloid? Guess so. Cat ears? I must admit that was overdone. The cat fest is really sad.
She also clings to Spain, because she is in love with him. Crush from Roma? Whore. That's it.
Taiwan
Stereotype? Cute japanese girl(expect those to show up in many shojo aka girly romance manga).
Problems? Japan-lover, otaku, highly regarded as Hima's fav, pink girly girl, no relation to plot, has a good for nothing idiot hair, high voice, hates China. Kawaii-desu girl
Many fans hate her because she likes Japan. She is lovable by all kinds, has no developement, has an idiot hair, and wears pink. Taiwan never said she hated China, nor she loves Japan. She likes his manga, and dislikes China's old manliness. She's the only one that has an unique haircurl that doesn't look like a ripoff of the Italies(okay Canada an America are exceptions, there are far more, but that isn't not the point in this). Also the way she looks like a high school kawaii girl is because thats the image of taiwanese according to Hima(also it needed to be cute). And she is actually very shy with men, except the one she knows very long like China, Japan... Oh and she isn't a mary sue. No she isn't. Don't you dare...
Vietnam
Stereotype? Badass stoic battle girl.
Problems? America-lover/beater (Tsundere). Doesn't appears enough in the manga or anime to have a personality.
Well it's kinda hard to relate, since she doesn't have traits most fans would envy. She is rather plain. But they occasionally stick the 'stoic no friends' label on her. That's sad.
( also, why America? She doesn't like him,nor hates him. She holds a grudge against him for the Vietnam war. I mean i WOULDN'T hold a grudge again someone who forcefully invaded my contry and tried to beat it up right? Right?)
Seychelles
Stereotype? New girl, gets most attention. Also a Kawaii desu slut.
Problems? Everyone likes her so she is a slut. No personality. Anti yaoi girl. (OMG SHE LIKES ENGLAND AND RUSSIA, MINE BIATCH!!!1!!1! I am not the only one who doesn't understand those 1s?)
Since the release of the game, she got harsh words on her. I must admit, i was a bit jealous of her

... But i didn't hate her, nor did i say she was a Mary sue. Most haters claim her to be a big whore because she can date the main guys, they probably like. She is airheaded, and shown to be really bright. In no means she is a mary sue or a slut.
Monaco
Stereotype? Meganekko(for the guys who luckily aren't in the anime,or manga, it means glassed smart girls.
Problems? Fancy for her own, leeches France, casino biatch.
Nuff said?
She doesn't get enough screentime but still...
Wy
Stereotype? Tsundere
Problems? Underage, pedo victim,of Seborga.
Seriously, how can a character that appeared in like 2 strips and not in the anime be hated? Why fandom why? Why...
Well, i made plenty of grammar mistakes in this one, i'm not awesome in english. Also writing on ipad is difficult. Feel free to discuss this, i will answer. I won't block anyone, who disagreed. All opinions are welcome, as long as they are not in Bash style.
(I will correct the faults later okay?)
EDIT : Corrected a bit. Not much because you will find more of them though.