Disliking a character is fine , hell , I hated Cloud as a competitive player , but when a Cloud player join the smash crew that I'm in , I wasn't like "Oh lol Cloud is busted he just camp limit and spam aerials with no lag and the size of the planet lmaoooooooooo" I respected his character but told him that I didn't liked Cloud for personnal reasons.
Saying that a character is boring , uninteresting , that someone else should take his spot , that not even his creator wanted him is actively trying to discourage people to support thus said character.
I can understand that you can hate a character with a burning passion , or just don't like him , or some of the supporters. It's understandable.
But if it boil down to problem with some supporters , I don't think this matter should be discussed in public. Except if it's something very big , like every supporter from one thread spamming another one with hate comments and stuff.
Also , concerning the fact that including Mallow in Geno's moveset would help people from approving the " He doesn't have enough moveset potential "...
You do realize that Ness and Lucas specials aren't even their own ? Ness doesn't learn PK Magnet , fire and thunder (I'm doing a playthrough of Earthbound , I'm at the Mr.Saturn Village , and Ness still hasn't learn theses moves even tho he's overleveled (lvl 25) compared to my Paula and Jeff) only PK Flash , heck , he has an exclusive PK power of his own , PK Rockin' , but it's not even used for his final smash ! He borrowed these moves from Paula and Poo ! It's the same song and dance with Lucas , just replace PK Flash by PK Freeze (I'm not even sur tbh) and Paula and Poo by Kumatora ! They are the support character of their party , not even balanced characters , they lean more towards support ! And nobody is complaining about that (also , Lucas's rope snake is owned by Duster , not Lucas) because it mean that they represent their games as a whole rather than just the character , and they become more intersting !
I rather have Mallow as an assist character in Geno's moveset that several uninterstings moves ! Heck , our goal is making SMRPG more popular , so why not including Mallow so SMRPG get even more love in Geno's moveset ?