I can’t stop judging other people

For about the past 2 years, I noticed that I have had increasingly negative thoughts about other people. The thoughts range from appearance to personality, lifestyle choice, anything you can think of. Lately I even started having negative and judgmental thoughts about family and friends and every time I have these thoughts I get so upset because I don’t think it’s how I actually feel, but it’s just the first thought that pops into my head most of the time. I don’t like constantly disliking other people because of these thoughts but I have to convince myself not to think them at times. I feel like it also started to affect the way I treat people.

How can I think less negatively and treat people with less judgement? Because just trying to think positively hasn’t helped much