I think we sometimes have categories of people we feel we should not get mad at. And when we get mad at them we are likely to repress it. One of them is nice people. But even nice people can provoke anger is us. There are people I have worked with before who are nice, friendly people…but completely incompetent at their jobs. It causes more work for me and lots of frustration. And joint projects I work with them on are always messed up. So yes it makes me pretty mad. Especially one person who was "too busy" to take the training that would have helped her be better at her job. Training that was supposed to be mandatory for everyone doing the type of work she did.