Actually no.
1) That only happens with Daisy , which is irrational thinking , being fair with Rosalina as is not her fault as a character , but the fans ... nobody likes them apparently.
2) Then again it's hilarious , considering Not even Now , people hate on the actual characters that are the face of Mario and Nintendo , like Yoshi for example.
In fact , back when Rosalina debuted , She was Accepted and Praised ; I even recall reading that she made top ten of Favorites in a magazine Just after 1 GAME.
Rosalina's Debut is in fact , the most memorable moment for the character , and even her return In Mario Kart Wii had everyone trying their best to unlock her. She comes from a widely popular game and she step in as a powerful figure and a character with a background, so the ''since debut hate'' argument is bullcrap.
THE HATE COMES IN , After Mario Kart 7 - Pre 3D World , era in which Rosalina fanboys turned rabid because they think that now that they favorite is gaining prominance , they have the right to trash other fanbases and it's characters because they don't appear in main games.
I don't agree with : '' Why Rosalina!? I wanted Daisy , because Rosalina sucks''
yet i agree with : ''Why Not Daisy? Daisy hasn't been in anything , yet Rosalina gets a free pass so soon''
Totally different vibes in those statements.
Yet there's always the Rabid Rosalina fanboy with responses like these:
''Daisy isn't in there because backstory , waifu ... yada yada yada''
''Daisy sucks , Rosalina is better because backstory . waifu , yada yada yada''
Completely petty and bratty responses coming from Petty and bratty so called ''grown men'' ( i don't consider 15-24 years old men as ''grown up'' btw because , well it's self explanatory , inmaturity at it's finest) that belong to that fanbase.
Rosalina fans think that , because she has gained prominence , other characters won't get as much as she does , and everytime someone dares to ask ''Why not Waluigi , Daisy , Birdo , Toadette'' , they jump in and put them down because they think they are superior because their character has been in a couple of more games.
Sucky , but legit.
3) Of course they are , the world vs them , proves it.
You need to speak up , because people usually don't like it when truth is pointed out , more if it's painful to hear/read.
There hasn't been an Major Mario character with such a problematic fanbase , until now , as before nobody had the issue with the dumb ''it's relevant , backstory'' argument.
And as a person Who actually appreacite THE ORIGNAL RETRO characters , i feel the need to speak up to people that think they don't deserve better.