Why do we bring down the success of others? Why don't we feel joy because someone else has success?
I think that we learn that kind of reaction. Children are very happy for the success of others and they really mean it.
Why do we became so bitter with age when someone else have success?
I believe that we can get back to the good feeling. I do believe that we can find joy in someone else success without feeling any regrets regarding our own.
A lot of people are saying that we can be more happy if we focus on our own small win and never compare ourselves with others. Maybe, but I don't think that you should isolate yourself from any occasion to celebrate the success of someone else. Yes, celebrate and enjoy with real emotion.