The matchday forum is like being at the pub - kneejerk reactions with your mates, driven entirely on the emotion you feel while watching the game.
There's no deep analysis or even shallow analysis - and it's weird to expect otherwise.
Threads like these are the equivalent of sitting in silence with your mates at the pub as they react to the match, then once full-time hits you pull out your phone and go "I can see you're all happy now, but remember in the 57th minute when you said McTominay was shit....oh you don't? Luckily I've been recording the entire game. Let's have a listen"