Sometimes life is like that - you don't know what you want until you actually get it. We can wish and manifest for something but it never actually comes about. We can hope and dream that the result will be as breathtaking as we have imagined - but it never quite turns out exactly right.
It doesn't mean that to dream is wrong.
It doesn't mean that you're not manifesting correctly.
Sometimes finding what you want and what you actually need are two completely different things. Just because we want it very badly doesn't make it right for us. Often we are guided to what we need and that is always enough.