Speaking from my own experience, yes, it can in fact be very difficult to learn from your mistakes if others only keep watching you repeat them and never tell you what you’re doing wrong.

I know there’s this school of though that says “if you don’t have anything nice to say, say nothing it all”, but in the long run, it doesn’t really help anyone grow if you always withhold the truth from them. Just try to be diplomatic about it and offer help if at all possible.