Unconstructive criticism is just awfull.
If you don't like something tell the creator how to improve it, don't just say it's bad and try and be nice atleast.
Usually they dont use that way, they are just being mean. Their purpose is not criticize the game.
That's what I mean.
I like constructive criticism, it's helpfull and makes you feel "Yeah, I did great but I can do even better!" , but if you just say it's bad and be mean, that sucks and if discourages people.