Well what I did 3years ago, really cut down my usage of YT:

I switched to NewPipe. I got angry with tge deterioration of YT and the fact that they hid dislikes made me angry. So, I deleted the yt app and installed NewPipe. Newpipe doesnt support yt accounts, I was too lazy to add my subscription and set the default screen to an empty screen.

I used to watch yt for around 2hours per day (~mainly memes, but in the further past I used to watch more sciency-stuff) and now I spend around 15minutes per day (~mainly music or tutorials(?), though, lol, I use other apps/platforms more, like lemmy). I think the fact that the period I deleted YT it was a period of various changes, might helped me change my daily yt consumption too.