In tech support parlance, this is called "setting expectations".

unfortunately the expectations were already set by the pre-sales marketing.

This is an issue that tesla created on purpose though. These people are confused that their car is not going as far as THE RANGE DISPLAY shows they will go. Hundreds of millions of cars have been made over the past twenty years with range displays that you can trust to hit zero BEFORE you run out of gas, due to estimating with recent driving data, and probably a gentle bump down of the number to make sure drivers have a safety net when they are stupid.

Has there ever been a single one of these systems overestimating by tens of miles consistently and for nearly every individual?

And what should Tesla do instead?

Putting a team together to tell customers their cars are fine seems completly legal and not a conspiracy in any way.

Stop lying about their ranges in the first place...?

Do the same, less inaccurate thing that every single other car maker has always done and give more accurate range estimations? Something Tesla already does in the route planner, and also show they know how to do as the battery meter gets closer to empty, when they switch out their estimation for more accurate ones?

This isn't difficult. Tesla is not required to use the EPA range estimation figures to do any range estimation internally, it's literally only something that goes on the window sticker. Tesla instead chose to design their range display to do something that no other automaker did, and use a KNOWN OVERESTIMATOR as their methodology for range estimation.

Nobody else has to set up these call centers because nobody else chose to set up their range meters in such a way to mislead customers. It's really that simple.