"never recommend channel" will get rid of the twit permanently.

It's worse than nothing, it's an engagement metric. It's better to block it entirely with plugins or ignore it.

From your youtube wall, click the tree dots aligned vertically next to the title of the video under the thumbnail and select "Don't recommend this channel" from the drop down menu.

You will have to do this for his alt channels and the twich clip channels as you see them on your youtube wall. Very soon he should vanish and you won't hear about him except maybe from other channels who shits on him.

Very useful to get rid of shitty AI chanels as well.

I dunno, it's been working for me, just figured I'd throw it out there, that's all. I wasn't expecting a sort of Spanish Inquisition.