If it irritates you to see people being negative, you know thats not something you yourself want to be. Dwell on why negativity bothers you. I‘d guess it has something to do with an innate knowledge that we all deserve kindness. Typically super negative people feel horribly about themselves, they have no other reason to say the things they do. It’s the type of person that tends to annoy me as well but when I think about that it makes me really sad for them, and then it feels easier to be compassionate. Anger releases dopamine. If you’re sad all the time, it feels better to get angry for a while. They’re struggling and desperately trying to make themselves feel better. We all need each others love.