For Instagram I've been using DFinstagram on my Android which removes most features, except chatting and viewing profiles. Also using Firefox with the IGPlus extension which blocks reels. But these make Instagram not feel as smooth or misses some features related to chatting, wish something that has this but still blocks algorithmic suggestions and ads existed.

For YouTube Revanced is very nice, but I also just removed my account, which helped me decrease the amount I spend on YouTube.