If people are emotionally invested in a poor decision, then they will retroactively justify it in a lot of ways.
One person's poor decision is another person's awesome decision. Let's use a different car company - Ferrari. Nobody buys a Ferrari because of the reliability ratings in Consumer Reports. They buy it because of the looks, the performance, the badge, or other reasons. The decision tree and evaluation of satisfaction about the purchase simply won't be based on whether it is as reliable as a Toyota Camry. Tesla is somewhat in the same boat. Reliability is pretty far down the list of reasons why someone buys a Tesla in most cases.
Remember that Consumer Reports has a particular view point on their evaluation of cars. They apply the same ratings to all vehicles regardless of whether those ratings actually are relevant to the buyers of those cars. This isn't a case of post-hoc justification of satisfaction. It's that the measuring stick for satisfaction is a lot more complicated than how reliable Consumer Reports thinks the car is. Consumer Reports provides useful data but you have to understand that it is data from a very specific view point which may or may not be relevant.