There are three I just cannot get rid off it seems: WhatsApp, Youtube (incl. Youtube Music) and HN. And Youtube is becoming such a pain lately, with all those crap channel recommendations and whatnot, that I am sometimes considering subscribing outside of Youtube, e.g. Patreon or so, to the one or two channels I regularly whatch. Which would leave Youtube Music and Whatsapp, both of which are just too convinient for the time being...

You can block channel recommendations by removing the html bits that contains them.

There is also the 'unhook' extension:

https://chrome.google.com/webstore/detail/unhook-remove-yout...

https://addons.mozilla.org/en-US/firefox/addon/youtube-recom...