Give people the benefit of the doubt. When people are rude to you, forget to say thank you or are not paying attention to what you think they should be focused on, instead of making it about you, do a 180 and make it about them.
Maybe they had a really hard day. Maybe there is something serious going on. Maybe they have a deep worry they can’t share with anyone. You just never know. Save your energy. Drop your judgements. Send them love. Move on.