When does the show get bad? (No spoilers please)

I bet this question is asked by like every new watcher, but when does it get bad? I just started watching and when I googled something I didn't understand in one of the beginning episodes, I found a reddit link that was like "The series gets bad after season 7" and others like "Season 4" "season 6" like everywhere. So I ask now, when does it get bad on an agreed upon level. Where did most people stop watching the show? No spoilers please, still in early season . Thanks!