I notice this trait in narcissistic people. I notice this trait in my family. They just don’t like seeing other people happier than them. Why is that? Perhaps insecurity. So, I learn not to take it personally. I just learn to avoid them, and their drama. I hate drama. I just can’t stand those fake/two-face bloodsucking people. People who loves seeing other people suffer. If you ever meet one. Walk away. ASAP. The sooner you leave the better.