@redbird14 You are having a similar problem to what other people had. https://forums.opera.com/topic/47934/solved-why-does-opera-keep-signing-me-out-of-everything-after-i-close-it this should be the fix.

I've seen a similar post about people being logged in every time they quit Opera but this is different, for I don't log out every time I quit Opera but instead weekly, to be exact every Thursday. I believe it has something to do with the weekly removal history, but I don't see a way to turn that off only to turn it on.