Maybe I'm going too old school here but the first 2 that came to mind were CommunityChannel and Phillip Defranco

Direwolf20, he was mean to the kid

Thinking about it now, it's been a long time since I saw a Goldvision video. I loved that guy and his calming contemplative gameplay, I was even on board when he decided to just never kill anyone or any npc in a video game ever again (but still play stuff like multiplayer shooters and GTA Online).

I miss his stuff, gonna go see if I've been missing out

Kurzgesagt went hugely downhill, I'll still watch the occasional video from them, but most of what they do now is super speculative tenuous science with 5 min of sponsored content.

I remember way back in the day I enjoyed laci green for her sex ed content, but she just suddenly went super right wing.

Community Channel...

Yogscast.

It just gone downhill after Jaffa Factory Minecraft series.

Quite a few, but off the top of my head, SecondThought. I really enjoyed his accessible antiwork/breadtube video essays for a while, even though they got a little repetitive. It was really hard to find good anti-corpo information.

I'd even watch them with my wife and they'd feel somewhat galvanizing right before heading off to a really crappy job I was stuck in.

What did it for me is when he got kicked off Nebula for his comments on a podcast, where he basically went full tankie and joked about the situation with Israel/Palestine, basically saying all the murdered Israeli civilians "deserved it."

I refused to let myself be influenced anymore by worldview of someone who would view other human beings in such a way. Apparently I was even late to realizing it. It's a gross feeling.

Pretty sure a lot of people could relate, but watching a variety of various game players who years later you lose interest in (mostly because of how cringe they are) or in my case at some point somehow find out some terrible news about them despite avoiding all the real world drama.

People like Bijuu Mike, Gloom, Logdotzip, etcetera.

Can't find another example I wanted to use since I couldn't remember the account name nor does it matter since I'm pretty sure it was found out he was a horrible person.

Also it's pretty interesting to see some people you're following on yt who you don't remember why you subbed to because there are definitely both active and dead channels I'm currently subbed to that I forgot even existed.