You shouldn't just reject criticism just because you got forum banned though. I mean a forum account is basically worthless. If you get banned, then you can make a new one for free. No work or progress lost unless you actually care about your post count. The ones giving you criticism aren't the ones who banned you, the people giving you criticism are the ones who want to see your renders improve.
That's a pretty good thought. Besides, as a community we are trying to help, not throw rocks at each other