How do I stop caring what people think of me?

You have to free yourself as a man from what everyone around you thinks. You're going to have a couple of people in your life whose opinion of you matters: your spiritual father, your wife, your children, maybe one or two friends. You take feedback from them, and everybody else doesn't really matter. I get negative comments about me all the time on the internet.

It doesn't affect my emotional stability or my day, because I don't know the people, and I wouldn't go onto somebody else's page and tell them they were a failure. Judge the quality of the people offering unsolicited disapproval: a person who does that is incredibly insecure, needs approval, has their own problems, and is looking to spread negativity. What they think of you really doesn't matter. Being self-referential in that way is A-tier.