I'm really diligent about whenever I watch something that I don't want YouTube throwing more of at me, to just immediately delete it from my history. For example, if someone on Reddit mentions some funny dumb video, I'll watch it, but then delete it because I really don't want YouTube suggesting schlock to me.
Most recently I watched a highlight video of Australia vs West Indies test cricket series my home page was endless cricket videos.
A few weeks before that I watched highlights from World Cup Asian qualifiers, for a week or so endless soccer videos.
Just because I look up one video of “how to replace a toilet seat” doesn’t mean I am a connoisseur of toilets.
The other problem I run into is that no matter what I’m watching, I’m two autoplay videos away from Joe Rogan (and other right wing personas). Who knew something as innocent as listening about the economy of Iceland can be two videos away from why the Superman movie is too woke.
My YouTube ads (and Recaptcha experiences) have gotten terrible because Google seems to punish you more the less data you feed them, but for the most part I feel like I have control of the data that I do feed them (some of which is intentionally misleading because they have no right to know and I hate targeted ads; I love Spanish language ads, for instance, though my level of Spanish comprehension is stuck somewhere around first year of high school courses).
My watch history is basically entirely my hobbies and interests and thus YouTube suggests more stuff related to those. A lot of it is channels I'm already subscribed to, but it does a good job of surfacing new channels that I wouldn't otherwise know about it.
When I watch a video describing a new lens for a Canon or Fuji system, I get flooded with videos for Nikon or Sony stuff later on. When I choose "not interested" I only get two options a) I watched this already (which YT should know obviously, as I'm a subscriber, or b) I don't like it. A useful option like "I don't have Nikon/Sony stuff" or something more specific like that isn't available.
Amazon for example uses an equally bad algorithm, it seems to be "industry standard" ...or even worse, because the don't need to offer me another fridge or washing machine once I ordered one. Idiocracy, sigh.
It is something that would bring me down otherwise. Just like I never dared to even try WoW.
I was a YouTube addict until I think late last year. Something changed in the recommendation algorithm and my recommendations became so bad that these days I can hardly find anything interesting to watch on the front page. I dig things out from my subscriptions.
I still pay for YouTube and consider it money well spent, it is a great source of information.