I wrote this little quick and dirty userscript for myself sometime back:
// ==UserScript==
// @name No Shorts
// @match https://www.youtube.com/shorts/*
// @match https://www.facebook.com/reel/*
// ==/UserScript==
window.document.body.innerHTML = ''
This isn't as comprehensive as the uBlock filter but it has worked pretty well for me so far.
Here is another one I found in my personal userscripts: