"What matters is if the criticism/support/guidance is accurate, relevant and just."
That is one of the best summarys in one line of teaching students I have seen yet.
And if you feel you want to teach flying and apply yourself with those goals in mind you should consider being an FI.
Mine so far is treat others as you would want treated yourself.
But so far I don't think I have breached the above, but I will from now on keep it in mind.
MJ