No. We all get upset over non-issues. But the guy in charge is supposed to lead by example. Snape is in charge, not Harry. If Snape was better grounded, he would have been able to look at his own behavior objectively and do a mental slap-up-the-side-of-the-head and say, "Wake up Snape and smell the coffee. This kid isn't James. He didn't do anything to you." But Snape, being Snape, can't see his own behavior for what it is--a flaw. Pity. Clearly wizardy isn't everything.