Some people do have a need to fuel controversy and conflict for the sake of it and for the high that it gives them. With these people there is no reasoning. Negative energy is a very powerful thing. Negative begets negative which begets negative. Choose to live your life in the positive.
Criticism can be constructive.
There is much to be learned from constructive criticism that is put forth in a responsible and caring way. Be kind and gentle to yourself. Do not criticize yourself. Remember that all you think, do or know, right now, is all that you have to work with. You are doing the best you can.