Living with no expectations is an exceedingly dull, soul-sucking way to live. I know, I've tried it.
Some expectations are a good thing. Just let go of the bad ones, or learn how to let go if an expectation is not met. You don't have to get upset when expectations are not met.
Goals are a good think. Faith in your own ability to achieve your goals is good. Spending time dreaming about outcomes and then wasting time wishing the real outcomes did not happen and wishing things had been different and that you had done something different ... that's all counterproductive.
Zen is all about cutting out the BS in your mind. Living inside your dreams about what should be, what should happen and what should have happened is all bad thinking. It's illogical.
Some expectations are a good thing. Just let go of the bad ones, or learn how to let go if an expectation is not met. You don't have to get upset when expectations are not met.