Did you actually read my post ? I specifically said it wasn't a Dembele thing. In general, a lot of people (not just on this forum, even though I have to admit it's probably the worst of the few ones I'm on) love to just basically say "X is pure shit" every day, and then just disappear when the player performs. You rarely see those haters posting "damn, he had a great game, hope he'll keep up", or admit that they've been partially wrong, or that the player is actually contributing to the team. They just vanish till the player they dislike starts playing bad again, so they can just keep on saying the same things as if anyone cared. And then they complain when people call them out. How fun.
I literally praise Dembele when he has great games though.