For better or worse with regards to my addiction, my subscriptions are all either science channels or high effort / high production comedy skits (e.g. DropoutTV). I still get slop, but I never subscribe and it mostly remains background noise
I try to react as “violently” as possible to any slop and low-quality crap (e.g. stupid “life hacks” purposely bad to ragebait the comments). On YouTube it’s called “Don’t recommend this channel” and on Facebook it’s multiple taps but you can “Hide All From…” Basically, I don’t trust that thumbs down is sufficient. It is of course silly, since there are no doubt millions of bad channels and I probably can’t mute them all.
That’s the point though. It may seem as if you’re not in control when scrolling, but you can adjust your behavior to get the content you’re looking for almost intuitively. That’s actually something good in my honest opinion.