Tesla has been topping the list in terms of buyer satisfaction for many years now. They have their issues, but people love them.
Many people like the things Tesla does well enough to not be bothered by the things it does poorly so are satisfied.
Tesla seems to have the best EV drivetrain in the business (I'm counting the battery as part of the drivetrain) and the best charging network, but seem to be worse in most other aspects.
My guess is that the other car companies will catch up on EV drivetrains faster than Tesla can catch up on the rest of a car.
An electric car, competently built, will wow most folks. Remember that the satisfaction numbers are comparing apples to oranges, given the limited competition Tesla has at the moment.