Sorry about your issue. I hope your insurance cover is adequate and relatively painless to sort out.
I assume you simulated stealing your own car, prior to being satisfied with your current installation. If not, then this is one of the drawbacks of a user installed system, in that you have no one to come back at, other than yourself, when it fails in such a manner.
Somewhat moot now, but from your current installation details that you have presented, I see two potential issues.
First, though it’s hard to judge reliably, I would say that your camera is mounted further away from your car, than that which Blink recommend for reliable operation of their PIR sensor. I didn’t notice, if you showed it, what sensitivity you have set, but if that’s less than the default setting of 5, then that too would contribute. I think Blink say 20 feet, for reliable operation. Yes, I just checked in their specifications, and this is detailed. As I said, hard to judge, but that looks like more than 20 feet to me. Perhaps more like 40, but you will know for sure.
Second, it appears that you have a weak Wi-Fi to camera signal strength. Again, Blink specify that at least three bars are required for reliable operation, and yours shows two.
In both cases the key word is reliable. It may work, it may even work during a test, but if you’re not within 20 feet, and only have two bars for your signal strength, then it’s not surprising that a missed detection can occur, every once in a while, especially if someone is being particularly stealthy. Only you can know how often you could get into your car without a detection, if you accidentally left it enabled on exit or arrival.
For my front door set-up, it has never ever missed a detection in comfortably over 6 months. Pretty much every week day I get at least two, one for the paper delivery, and one for the mailman. Indeed, if I ever miss seeing a video of the mailman, then I know for sure that we have no mail for the day, but this is close, not 40 feet. Probably detected at 10-12, with an approach to less than 5.
I would hate to be in your shoes, and have to go through all the hassle of an insurance claim, and would love a video of the perpetrator doing his thing, but in fairness, either way, the car was going to be stolen, and you would be going through pretty much the same thing, bar having a video to show to the police. Unless you think you could have responded in time, and stopped him in his tracks. In fairness, not something I’d like to try, but you could be entirely different.
Like I say, somewhat moot, and not so helpful, but do bear in mind that whatever system you get, if it isn’t professionally installed, you should do your own extensive testing to make sure you get 100% reliable triggers, otherwise you may risk missing something else. I hope for your sake that there is nothing more, ever, to be recorded, or not.
Once again, sorry to hear about your situation.