I used to code my tumblr themes from scratch when I was 13, I have been using most social medias since before they were popular and I can h*ck my way into a few things I shouldn't. So pls, tell me why the fuck I don't know how to use Facebook? Their interface is so fucking weird

I get on fb like once or twice a day to check the groups I am in. Almost every day I accidentally block someone or unfollow something or delete an old post or something. Idk. You would think an app like facebook would be the easiest thing to navigate but I just can't??