So, at first I deleted Pinterest and logged out of my account. As I don't remember my password, I'd have to get an email to restore it, but I'm too lazy to do that.
Then I deleted the Reddit app, but not logged out of the website because I have a limit to it of 20 minutes a day.
I'd like to get rid of YouTube, but it's not possible to uninstall it for some reason 🙁
At least I'll get a Chrome extension in my browser to block it on PC.
Edit: Logged out of reddit on PC, got a YouTube blocking Chrome extension