OMG!
Does nobody in this world know how to communicate effectively and with respect when you want something from the other person?!?!
Yeah, I get you say they lied but when you accuse someone, even if they did it, they’re no longer going to want to help you, ever. There’s a way to deal with liars without being confrontational and getting them on your side - but that’s for another day.
Getting what you want 101
Pick a different SC that doesn’t know you or your reputation. Get there with your car below 50% charge and simply take the technician out with you to a SuperCharger and show him/her the problem you are having. Feel free to have additional information with you of other people with Model 3s (not Ss or Xs) and their Supercharging rates IF and only IF the technichian isn’t knowledgeable about Model 3 charge rates.
Don’t tell them what you think is wrong with your car because it’ll be their natural tendency to just check that and you might actually be wrong about what’s wrong with your car. It’s their job to diagnose, not yours.
And for Pete’s sake don’t go on and on about bad service at the other SC, or lemon law or lawyer crap, or how you had to listen to your kid cry, the latter a whole other issue for another forum.
Be patient, respectful but persistent if you have to. Don’t talk incessantly about the issue or what you’ve been through, keep to the facts of your problem, nothing more, nothing less. Crack a joke, smile to start things off on the right foot. Be pleasant even if you find the whole thing frustrating.
FYI, I have over 25k miles on my 3 including several road trips, one over 3,000 miles. I don’t have a clue what my car specifically charges at because I plug in and go pee, then get more liquids so I can go pee again at the next stop. But I know I regularly go from 20%-80% charge in under 40 minutes. I know that after 80% it slows down a good amount and I’m guessing here, but it takes about another 10 minutes to go from 80-90%.