Expectations cause frustration. Frustration is a byproduct: the more you expect, the more you create your own frustration especially if you expect too much from others. Frustration is not really the problem, it is the result. Expectation is the real problem. You have no control over others and that can cause ever ending frustration. You should only expect of yourself and you will save a great deal of aggravation and irritation. Do not set yourself up to fail causing even more frustration. Know your limits and do not expect any more than that. You can not be frustrated or disappointed and be happy at the same time so pick happy when ever possible.
Just be happy