Do you want not to criticize?
Avoid any comments or involvement with other people.
Experience will show you that even praising somebody is not far from condemnation…

Also note this:

Be indulgent to the other person’s weakness and comfort him by doing what he likes (except sin, of course), even though it may seem to you that it is just a whim of his. Be careful not to become angry about this and neither resent nor condemn him. This is the correct Christian morality, Christian love and kindness!