Find areas of agreement. Relationships are much better when both people focus on their areas of agreement rather than their areas of disagreement. Most people agree on more things than they disagree on. So if you focus on your areas of agreement with the other person, your areas of disagreement will seem smaller and less important. Criticism builds hostility and bad attitudes.
Criticism is poison to good human relations.
They don't like it, either. And you won't help accomplish anything good by criticizing. If you can't say something nice, don't say anything at all. Show honest appreciation. You like it when other people take the time and interest to recognize and appreciate the good things you do.