lol stay away from the shorts and tiktoks except thru 3rd party sources. They're deigned to dopamine fuck your brain. At least yt has a hide for 30 days feature on that shelf

jewtube revanced will get those jewy shorts off the main page for you. Along with ad block, sponsor block, and a working dislike button.

Download the Youtube Redux addon. It restores the UI back to 2015, removes the shorts tab, and allows you to watch shorts as actual videos.