avoid the situations you do not like.
avoid the persons you find bad habits.
In case of human beings, Avoiding does not mean, the person. It means, you avoid the bad habits.
You do not dwell upon the things you think are bad, rather you move on.
keep your vision clear, and move SPEEDILY, so that the person or situation that is not well aligned with your goals, gets left behind.
But try to love every human Allah created, and forgive their mistakes as you would like to forgiven by Allah on the day on Judgement.
Fight when it is your life goal, without which you can live. Something that has a worthy impact. Somthing that is worth struggling for. Something that is more than your self, your ego, or your short life in this dunya.