It’s completely bogus. It’s partially because owners don’t know how to use the functions and get frustrated. My model 3 has by far been the most reliable and hassle free car I’ve owned so far including a Honda Civic and Infiniti g35 both of which are known to be reliable.
Whether you bought a Tesla Model 3 or intend to do so, use this comprehensive guide on known issues of the Model 3 to know what to check for. Rust? Paint problems?