Combined with the risks from their autopilot system and their mistreatment of workers and their CEO being a right wing edgelord? There's plenty of reasons to think Tesla might not be on a good path.
Other than tire rotation, cabin air filter change, and wiper fluid refill, our cars have required no maintenance.
But arguing from anecdote doesn't really help.
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.
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.
This depends a lot on the factory / year of production. E.g. the 2021/2022 from Giga Shanghai have great quality. Of course, consistency is the key, Tesla has to achieve it across all of the factories.
And I have no idea what 'risks' are you talking about regarding autopilot.