Well now you have me curious why you feel that way!
I definitely do not think DS3 is flawless by any means - my personal biggest issues with it were always that it looks so incredibly, aggressively drab and how linear it feels to play for most of it - but I'd never call it awful.
As for DS2, I'm with you on that, I never got the hate for that game either.
I don't love it, found the majority of its bosses pretty boring and kind of hate how incongruous its lore is with the rest of the series, but that's about it - it's still a really, really good action RPG.