I didn't mind naive rating algorithms before statistics and recommendations got so gamified.

YouTube and Amazon are some of the very worst. I regularly watch a video or song on YouTube (/Music) and explicitly say "I enjoyed that but don't want YouTube to focus on recommending me things like that so I'm not going to hit like".

Amazon, there are entire classes of links I won't click or products I won't search/buy because I don't want them filling my recommendations forever.

And no, having to manually dig through settings and find a list of my entire history to manually delete entries isn't a good workaround. Too much effort, easier to just not give the platforms the data in the first place.