do you have an account about which "you care somehow", like banning/disabling specific channels explicitly? Ive found out: If I tell youtube what I want by sometimes thumb-up/down and explicitly clicking on "no more vids from this channel", then the results a) much better and most of the trash is removed.

Though, new AI-slop channels popup some days - esp. new/fresh channels, but these you can ban anyway since most new channels are AI slop. or "XY ... official" or "XY .. best of" or "XY .. clips" or "XY... fails"

I honestly haven't tried putting effort into the platform for a while now. I have very targeted things I watch (links to the channels) and go direct instead of navigating the homepage at all. I think my upper confidence bound on the value of the YT homepage and improving it is pretty low so it will be a while until I give it a try again.