People are entitled to feel good about themselves and SHOULD feel good about who they are and SHOULD love themselves. If you ever have issues with yourself as a person, then you should change something in your life to be happy rather than to be upset. People deserve the right to be happy and content with themselves. It's simple.

Now what I don't understand is why do some people make fun of others who DO feel good about themselves? What bothers people enough to make them think that a person shouldn't enjoy what they like doing?

You shouldn't feel ashamed of who you are just because people don't like some of your actions. You should do what you want to do in life without other people's opinion affecting you.

And most importantly you have every right to cut every negative person out of your life.

I don't know, these are some of my thoughts.