I also had the unfortunate experience of working at a dealership as my very first job and you are right. The level of customer service you get there is superficial and only extends to the veneer of courtesy they put up to lure you in. I would often hear service technicians and even some of the higher-ups complain about customers when they thought nobody else could hear them, or maybe they thought that since I was also in a customer service role, that I was "one of them" and would understand.

I'm thankful for my experiences in that job, however. I can't ever be tricked by a charismatic salesman, because I know deep down that there's a good chance that that salesman only sees me as a walking talking bag of money. I think that's a big reason I would never fall for Trump's grift either - he's literally no better than a used car salesman.