If I have no interest in that subject, I can't tell YT to recommend me something else.
On Android, and I assume on a logged-in PC, there's a mechanism (via a form of 'hamburger menu' IIRC) to mark a video as "not interested".
I've found when I strayed into dash-cam territory that it can be effective in getting that genre out of the recommendations fairly quickly.
(Logging in to YT or other google 'services' is NOT something I recommend one does lightly - tor on top of 3 layers of vpn, using a computer that's already atop a nice pile of thermite is close to safe)