No waitlist should ever be a surprise, unless you defiled your interviewer's office so bad that you just KNEW you were going to be rejected.
The only other real surprise for anyone, even the cancer-curing dead-baby-holding all-stars, should be a fat package in the mail with the word "Congratulations" buried somewhere in the first page of materials.
Agreed. The best mind set in applying for medical school is that you won't get in and you should be humbly shocked and ecstatic when it happens.
Unfortunately OP, you're not alone, we are in a generation that feels entitled, and most people I know are shocked when they don't get in to schools or are rejected. Medical school applications are a crap shoot and they depend on someone subjectively liking your application and your interview - you can't count on it.
I know one person who asked for help on her essay, didn't take the help she was offered, resent the essay asking for more help, didn't take that help either. Asked for advice on whether to apply this year or wait (she was super late and had a poor MCAT), didn't like the advice she was given and didn't take that either. Now she is shocked that she's having a poor cycle and thinks med schools are out to get her.
Our generation needs to learn some humility.
(Disclaimer - this is general to our generation not to the OP)