People say i have attitude problem and that's affecting my mental state

Hi guest,

Talk to a counselor or another "independent" party about your attitude.

Just because you are smart doesn't mean you can't have an attitude - especially if you think you are always correct.

If it is affecting your mental state see a therapist. However, a little introspection would do you a whole lot of good. It will give you a perspective. We all have knowledge about others but very little knowledge of ourselves. Try to be good to others and think less of what others think about you.