You’ll always be disappointed as long as you have high expectations. Eventually nature will force lower expectations upon you. So you might as well get used to it now.
How many ninety-year-olds do you know who have high expectations? Humility is eventually forced upon us all. The sooner you submit, the sooner you’ll be happy.
“Do you want to know what my secret is? I don’t mind what happens.” ~ Jiddhu Krishnamurti