Good strategy, thank you.

Although it is not a pleasant situation, I prefer to hear what my friend is saying accordingly and change my behaviour if there is something wrong.

So meaningful and practical! I do appreciate it.
With your permission, I comment on your form, because the meaning is flawless.
some people has –> have
sensitive personality (space),
ashamed of being criticized
we should bear or keep in mind that
be careful that lest our criticims should bother
overgeneralize
don’te relate it to –> not relate it to (in reference to ‘should’)

There should be some rules in criticizing people. The most important one is knowing the personality and characteristics of the person we are going to criticize. Some people has very sensitive personality,so we should be careful that our criticisms don’t bother them. The second factor is finding a suitable condition to criticize. It’s better to criticize people privately because most people usually become ashamed being criticized in front of others. The third one is knowing the way of expressing our criticisms. We should have in our mind that criticizing people should be done in respectful manners. We should focus on the intended specific matter and don’t relate it to other things. In other words we should not over generalize it.

.

… trust the role of (omit ‘in’) …

I agree. Thank you.

Of course, it is right when criticism is private. I believe that if a person criticizes another publicly, thus he asserts himself. Sometimes even he shows his aggression.

Just omit ‘the’ before ‘critics’, because this word must be indefinite.