There are several things to attack on the Tesla autopilot, the name being the least of the misleading marketing, and honestly a bit stupid to focus on.
The dude has claimed for close to a decade now, that (FSD) "is right around the corner!"... "It's coming end of the year" and shit like that. That is significantly more misleading than a product name (autopilot) that is about the same level of misleading as other manufacturers names for similar functionality.
They have not claimed autopilot to be any more than a driver assistance feature, and it has always been marketed separately from the FSD package.