As one of those p85d peeps, I believe @oktane is perfecty fine talking through their disappointment, and even though they have a propensity for continuing to state this a tad too often for some, the lessons I can relate to as the reality of sadness when the Tesla tarnish occurs.
Things I generally recommend now to mitigate this are:
a) don't believe the accuracy of anything Tesla says ahead of it being independently verified (e.g. AP1, HP claims, battery capacity, etc). I don't believe they are purposely lying all the time, rather appear to be very creative with the realization of Elon's unencumbered enthusiasm as reality hits.
b) never evangelise, or perpetuate the evangelism from others, to anyone else for anything you haven't seen. This way lies the erosion of friendship and credibiiity
c) concentrate on getting your money back for functionality not available on the due sheet/Monteray sticker of the car - from @oktane 's previous posts they appear have more than enough to spend $100 or so and talk to an attorney on options assuming your have exhausted all options with Tesla. Either way, it's not worth stressing about any more. I sometimes wish I'd gone after Tesla for the missing HP, though it's plenty quick already.
d) Most importantly: remember you have a great car in its own right.
Tesla's mission is important and the early adopters helped move that forward. Sometimes it is hard for those who have been significantly invested to think of Tesla critically. Doubly so when combined with hindsight-biased historical recollection. Elon himself has stated that constructive criticism is key to making better products. This will be needed as the masses buy Model 3s.
Net: We can't presume poor intent when others don't see the world from your own perspective. I just wish I had the ability to think this objectively more often, rather than with emotional response
My 2c
Thanks for your wise post.