How do I stop having expectations?

Tldr: Realize that capitalism rules our lives and has disjoint its goals in a way where everyone is just following orders with a healthy mix of Ayn Rands we all need to be more selfish.

Unless your goals are directly aligned with corporate (which hospital management is) then there is no point in pleasing you. That includes learning. They are happy to profit with you there, even if learning means they can move you to more lucrative profit opportunity. Senior managers love to trip on dollars to pick up pennies. Besides you could bail on them after you’re done learning to a competitor. Better to hire someone done learning and saves them having to pay for your learning (which you have the power to leave with before they break even)

Ayn Rand bit? Keyword objectivism. Being a selfish pos will lead to a better society in aggregate. Really at a minimum the less you work the more you are paid, so no one will want to divide the responsibilities as it represents a cut in their pay.

These are sliding scales and its up to you to determine where your peers fit on that. Even they don’t do it consciously. Welcome to the free market.