This is not life time achievement evaluation:)

I praise him when he plays well, and I criticize him when he plays terribly. 

Seriously, if he has a few bad TOs or decision makings, why do you have to give excuses like "he played well in the first quarter"？ Well, didn't people get excited when he played well? Should someone say, oh, no, he played bad the game before?

Can't we just 就事論事？