Hardcore people dislike casuals because the existence of casuals has altered the gaming market substantially.
Back in the old days, most games were made for hardcore gamers. Massive RPGs, high APM RTS, brutal side scrollers, etc.
Now, though, the main audience is mainstream casuals who don't want games to be incredibly hard or excessively complicated.
This means hardcore gamers have fewer new games per year to suit their style. That's the main problem they have.
(He/Him)
I write Naruto Fanfiction. But I am definitely not a furry.