I finally broke wasting hours on YouTube shorts (and youtube in general) by turning off the watch history on my account [1]. It completely removes all videos from the "homepage" (including shorts from the sidebar). There are still shorts in the subscriptions page, but I think this is an acceptable tradeoff. YouTube for me now has just become who I'm subscribed to, which is a much more pleasant experience - there's an "end" where I'm finally caught up and can move on to doing something else. This is also for my entire account, so it's not something I can just disable from my browser bar or that won't work on mobile. I don't need to remember to set it up on a new device either.
There is a great browser extension for Chrome/Firefox called "Unhook" which allows you to selectively remove parts of the YouTube UI you find distracting. Personally I have shorts and recommended videos turned off.
I've always found "doom-scrolling" fascinating because, for all of my addiction-prone traits and ADHD-granted hyperfocus, I never seem to get sucked into it. I've opened TikTok a few times for some random video I've searched and continued scrolling the next few videos out of some UX-driven guidance...then completely lost interest after 4 or 5.
Funny/Memey videos with low content value are entertaining, here and there. A rapid succession of them does nothing to the reward center of my brain. Or worse, the video would clearly be better as a longer form video and now I'm just frustrated (this is more common with YouTube Shorts).
That being said, I probably have YouTube normal-long form content running in the background 4-8hours out of the day.
[1]: https://support.google.com/youtube/answer/95725?hl=en&co=GEN...