You annoyed him?! His reaction seems pretty extreme.

You have an upcoming surgery and are, understandably scared. So, you text 'I want to be alone' and not only does he show you a total lack of support or empathy but he blocks you AND calls you "retarded". And now YOU are the one who has to grovel. Wow.

What kind of relationship is this that whenever things get rough (or whenever his highness is upset) he cuts you off? That is a major red flag. He is basically 'teaching' you to: 'behave, do as I want you to or I will cut you off'

I think you would be better off without such a controlling male in your life. It all seems to be on HIS terms. What kind of relationship is that? A one-sided for, for sure.