I think I can relate - I sometimes obsess about/replay things that happened in the past, but the replays often get more over the top. It’s always based on events where people were just arrogant or aggressive towards me with little/no provocation from me. Sometimes my mind makes up similar, but imaginary scenarios and people, too. They make me angry and upset at myself and I’m not even sure if there’s a good reason I do it. Maybe it’s trauma related, in my case? I’d just love to not do it! I do have a therapist (on holiday right now) but we haven’t really talked about this yet.
I’m easily irritated, too, more by people than things.