My experiences in the two states where I’ve been licensed to drive (Missouri and Illinois) have been no better or no worse than what I would have gotten from any other government agency – which is to say, understaffed, long(ish) wait, mostly-polite workers who are doing their best in a difficult environment.
Truthfully, I’ve found the patrons to be far more hateful than the workers. I remember one time in Illinois, someone wanted to do his behind-the-wheel test and his dog was in the vehicle. The tester stated, politely and repeatedly, that he couldn’t administer the test if there was an animal in the vehicle. The applicant treated this as a personal insult, and he offered every excuse in the book and, when that failed, got downright hostile. I do feel for the guy – he was obviously homeless and living out of his truck and probably couldn’t have afforded to board his dog even for an hour or so. But, rules is rules, I guess.