It is endlessly frustrating that companies have universally decided that they won’t let people say “no” to stuff, ever. There are no longer options to reject stupid-ass new “features”, only postponement until next time you open the app/website/program. They’ll continue pestering you for the rest of your life. I realize that my frustration may be a little over-zealous, but we deal with these interfaces dozens of times per day and this is user hostile behavior. There isn’t really an option to just use another service or program, since the entire technology landscape has been commandeered by a few major corporations, and they all enact the same shitty things as a group.
Use something like ReVanced, which has the ability to hide Shorts forever (or until YouTube changes their backend enough that you need to update your ReVanced install to continue blocking Shorts). ReVanced also has the ability to unlock certain Premium features for free, and it supports SponsorBlock, among many other things.