Both being jealous and mentally knocking people down are pretty normal human things to do. If you listen, you’ll notice lots of people say things out loud that have the undertone of here’s why you’re not that great or here’s why I’m better than you. Sometimes it’s subtle, sometimes it’s not.
The main thing I tend to think about is how I’m not in competition with anyone but myself. I can improve, or not improve, and I can affect my own situation. But either way, it doesn’t affect anyone else, and their lot doesn’t affect me. It won’t help me make more money or get more attention if I bring someone else down, nor will it prevent them from getting attention or money.
Another way to approach this is acknowledging that some people are actually very talented, some people are very focused and work incredibly hard. You have the option to drop the jealousy and join others in respecting someone’s achievements. You can also study them, find out what they’re doing and how they work in order to emulate the behaviors that got them where they are.
Another way to deal with this is meditation. If you study a little meditation, one of the first things you learn is how to identify your talkative and often negative inner voice, and then after you learn how to recognize it, you learn to acknowledge it and let it go, in favor of a more peaceful and positive inner monologue.