There are two problems in life; either there is something we don't want, or we want something that isn't there. The first reason creates aversion. The second reason creates longing. Most of the time, both situations trigger frustration.
To let go of the frustration we must learn to accept reality as it is. Nothing is right or wrong in itself. See the world exactly as it is: perfectly imperfect.
Acceptance doesn't mean passivity. It just means we don't argue with reality: we don't resist the truth of what is. Once we have accepted that things are exactly as they are, we can now focus our attention on what we want to manifest in the world. it's interesting to see that transformation usually happens as a result of accepting something completely.
The eternal tension between what is and what ought to be either causes frustration or transformation. The choice is yours.