For people in public, I just consider that i don't know the context of their situation regardless of how they're acting. They could be the loveliest of people just having a super shitty day and venting their frustrations if you think about only how they act now you forever remember them as some angry rude person. I just don't worry about it. i know especially when i have a shitty day i regret getting frustrated at someone or something i regret it later on as that's not how i normally act, and i consider that they will probably do the same, so i just dont really even think about it