the main girls aren't exactly bullies actually, it's just self inflicted trauma by the MC. I mean the whole "bullying" thing would immediately stop if the retarded MC stop challenging them into punishment game everyday when they're kids.
No one call him dwarf beside the demon general who saw him via crystal ball, since dwarf extinct and never saw one everyone reaction in human world is "what's with this sassy lost child ?" aka they still think him as human child and no one told MC He's a dwarf.
There's one I think I've read in the past I forgot the title, the story is about villainess trying hard doing Villain thing to make the original story happen because She a big fan of the story but She doing it in so clumsy way that the Prince ended up liking Her instead the original Heroine.
not only that he lost the sacred treasure to the demon, he probably will get death sentence for that and with no power he can't protect himself he screwed really badly.