Sure there are alot of dumb GMs out there.
But dumb in what sense?
I'm not saying fans can't be critical, critique, or call out a GM when they think a stupid move/decision was made.
That's a part of the game of baseball and in being a fan.
But the fact of the matter is, and IMHO..... the dumbest GM is still far smarter and more experienced on how the operation of a franchise works, then the average fan who is saying he is stupid.