Unsolicited 'advice'. For that read 'I am going to tell you what I think about such and such that I am 100% sure you don't need or want to hear but I'm going to do it anyway because I am so arrogant that only my desire to hurt and upset you matters because I have issues'.
People who don't say thanks you when other people do things for them ( hold doors open, make them tea, help them with something).
People who think they are better than someone else by virtue of their social status, race, profession, religion- whatever.