I'm sure your a good guy and have some valid concerns but just being honest, your pretty much hitting every stereotype of a Californian that wants to hire a lawyer the minute things aren't going his way and only trying one solution, i.e. dealer. (Sorry, midwest perspective here.) LOL
The vibration thing certainly may be concerning but the dealer acknowledged it and it's documented so that is in your favor. The truck has a bunch more warranty on it, just drive the thing and see what happens. It will eventually either break something or you can put the effort of going to another dealer and letting them look at it.
The passenger door thing should be easily fixed by a reputable body shop. Talk to the body shop manager and tell him your concerns. Paint repair, if any will likely not even be in an area that will not be visible enough to offend your pursuit of perfection.
HVAC. This may be a weird one but honestly, how many times are you going to be in 20 degree temps in socal? It's documented and under warranty, just drive it for a while.
Brake pedal clicking is totally normal. Also does it on my 2023 Raptor 37, my 2022 Explorer ST and my wife's 22 Bronco. Turn up the radio.
Fob detection issues a few times. Change the $2 battery and it will likely fix it. Or keep the fob in your pocket where it belongs so when you approach the vehicle it wakes up and senses that your approaching the vehicle as per design.
The B pillar is fixed so now a non issue.
At the end of the day, a reasonable person would ascertain that you have two potential relevant concerns. The vibration and the passenger door. Looking at this in a completely analytical mindset, considering pursuing a buyback at this early stage of reasonable problem solution efforts is completely over reactive and should you pursue this you will likely find deficiencies in the next vehicle you purchase as well. Put some more effort into it and try another dealer unless you just don't want it and are looking for a way out.
You said you had thick skin so I hope you can take this in the spirit it was intended of providing honest feedback.