Unless I'm reading this wrong, I'm quite taken aback at Rick's behaviour -
1)He goes to the wrong place,
2)When he sees that she is upset he tells her she is in the wrong
3)Then he apologises to the waitress for her when she is less than perfectly polite (I do not get the sense she was rude to the waitress, just abrupt)
4)then he walks out for a phone call,
5)comes back, pays up and leaves, all within about ten minutes (the space of time taken to sit down and have the waitress come to take the order), purely because the woman was annoyed she'd been left to stand around for three quarters of an hour.
On his "plus list", he apologised for getting the meeting point wrong.
And paid for the drink she spent 4 times as long waiting for as it took to drink.
Sorry but I think the woman was the one who dodged a bullet.
I appreciate it was an honest mistake, but when the other person tells you she has been waiting ages, you don't announce she is wrong even if you think she is, you say there's been a mixup and apologise.
And it takes time to get back on an even keel if you've been standing around for a long time - I appreciate that also applies to Rick, but the difference is that the woman dealt with her irritation internally, she didn't start calling Rick out on his bad behaviour until he left the restaurant to take a phone call - and I do think that's what the back-up date comment was, probably framed as a joke that fell completely flat.
If I had to guess, I'd say the "what went wrong" messages were meant as "what happened to the guy I talked to online, you were really abrupt and dismissive in person" or "what happened to the nice evening we had planned, you weren't bothered", rather than "what happened to our wonderful evening that I was enjoying so much".