Yo, guilty of this too, but focusing on how stupid others are is, in turn, stupid. =)
Yes, it might give us cheap feelings of intellectual superiority, but at the end of the day we aren’t growing substance here.
Applying this to BJJ, always try to look for things you can use. Usually there is at least one thing, but if you can’t find something, simply move on. Again, we’re not doing ourselves or others any favors by dwelling on how garbage some one’s technique is:
When catching myself doing this, I try to see it for the self-indulgence that it is, because celebrating how wonderful I am just really isn’t that interesting; especially if the goal is showing up to learn something!