it's hard ot say. Without knowing the situations first hand it's hard to determine if it's that you are just triggered by criticism when it's not invited or is it a problem that involves people that tend to criticize other's a lot. The reason I make the distinction is because the approach would be different in each instance.

If it's a personal thing and you have a hard time accepting criticism of others then it's internal and something you need to work out within yourself and analyze why you are sensitive to such things. Cutting off others for this reason would likely just leave you without any friends left to be near and have relationships with.

on the other hand if it's overly critical people that have a tendency to criticize everyone and every little fault they can find in others, well that's a whole different ball of wax and I would definitely distance myself from people like that. They typically do this without any personal vendetta against anyone in particular, just are generally judgmental of most other people. Why that is doesn't matter, it's just simply that it's best to limit contact if not cut them off altogether from yourself.

The bottom line is that it takes discernment to figure out which is the case in every instance. If this is a chronic problem, I would venture to guess that part of it may be the former, and there's nothing wrong with that, just that something that you'll need to work out for yourself. But take time to discern the difference between each situation with someone that you find to be overly critical of you.

Hope this helps.