Smarttube will block shorts, works best on TVs and large screen devices.

YouTube revanced will as well, make sure you download the right one, lots of fakes out there.

https://old.reddit.com/r/revancedapp/comments/1pebuhd/simplest_way_to_get_the_official_revanced_youtube/

Not sure if you can filter out shorts within browsers with something like ublock origin filters, may need to look into it.

Shorts are literally brainrot. Fuck tiktok, fuck shorts.