It handles the same roads and conditions as pretty much all other manufacturers do with their TACC+Lane-Assist solutions. It maintains distance to vehicles ahead, and keeps the car centered in the lane on straight road and gentle curves...nothing more.
The issue is people using this simple ADAS way outside it's constraints, and wanting it to be more than it is, and is advertised as. Autopilot is not a self driving solution, and isn't advertised as it either. It has the same limitations as other ADAS solutions in other cars, but apparently because Tesla calls their solution "Autopilot" people completely disregard warnings and limitations of the system and insist on using it as a self driving solution.
I'm not sure why people have issues differentiating FSD and Autopilot honestly, they have separate names that are not similar sounding.
I 100% agree that FSD has been falsely advertised for almost a decade now though.