I find the autoplay so annoying because it hides the thumbnail which was carefully designed to communicate why I should click on the video and replaces it with, usually, a talking head or stock footage. Often the video gets inexplicably added to my watch history, and if I do choose to click on it I have to go back to the beginning because I missed the start of the audio
You can disable autoplay at https://www.youtube.com/account_playback, then uncheck "Video previews". It resets itself every 15 days or so, but at least one can have some peace in the meantime.
Are you saying that YouTube just alters your preferences?
I suspect that the managers in charge of some of these features are lobbying for it as a way to artificially increase the engagement stats for their features, but spinning it as actually being good UX instead of a user-hostile move because it's important for "discoverability" or something like that.
Then it was "hide shorts for X days" (I think 30?).
Now it is "show fewer shorts".
Lately the option to disable ambient lighting around video has been reseting to ON for me on every video I open.
I cant even formulate how I feel about that without breaking some rules somewhere