IT Director of a Healthcare Nonprofit here
And former Azure Engineer...
I agree... There are a number of configuration issues on the backend that could be contributing, or simply not performing any real time analysis and smart scaling. I can say that I'm pretty confident that that is not all it is doing though, because every time our customer facing side goes down it seems that internal facing side goes down as well. Regardless a little bit of monitoring and automated scaling would seem to solve a lot of the issue.
However, as you said this system is clearly not a priority for Tesla, and once I have my car, I will never give it another thought lol.