Honestly the problem is 1/3 VRBO's fault for poor UX and 1/3 mine for not checking I got a confirmation email.
My first time using VRBO. I failed to make the final payment before the trip. But I totally thought I did, and I didn't think I'd be allowed to come otherwise so just went on with my life. Two days later the host threatens me with legal action via VRBO message and phone at 5:55am! Basically a customer service nightmare! I feel for the hosts, I really do. They've probably had guests who genuinely intended to skip out on payment, but geez, maybe try a friendly reminder first?
Also the alarm on the back door would go off for no reason, so we just ended up using the front door. And there were no dishwasher pods so mostly had to wash dishes by hand. But overall it was actually a lovely and relaxing weekend and I really enjoyed the property! Gorgeous view of cypress trees, toys for kids, very comfortable and clean... It was just all colored by this really unfortunate interaction at the end.