You can be upset about your fantasy team losing, and you can be upset that Plax didn't play well, but being upset at Coughlin for benching Plax, now if you'd watched the game, you'd realize that that was just plain stupid.
Of course he didn't bench Eli. QBs are going to turn the ball over, coaches live with that. They turn the ball over because they are trying to make plays and that's what coaches expect from the QB position. WRs who turn the ball over in consecutive drives, however, deserve to be benched 9 times out of 10.