I don't hate the "style" exactly, and if we're being blatantly honest, not all of these shows look the same either. You gotta take into account line weight, color theory, backgrounds, framing, actual legit spesific style choices. You should be able to tell a character from Steven Universe from a PPG reboot character, is what I'm saying.
All that said, there is a common gestalt, and one that's become used for the simple sake of it. What started as a sort of throwback to 80's doodles has become a more refined chimera that's used for the sake of following trends. And I think the TC reboot has become the sort of boiling point where even common people are taking notice of its exhausted exposure.