YIKES!! I’ve heard horror stories like this about oil change places like Jiffy Lube (IFFY Lube?).
Sitting in a dealership now, watching my oil get changed. Costs a little more and takes a little longer, but watching the mechanics through the window, and the difference between them and the quick lube guys is striking. I'd gotten used to oil changing guys having tattoos everywhere. Haven't seen even one on the six working today. Heckuva lot cleaner than the quick lubes, also.
Only one actual bad experience at a quick lube. Oil change, driving down the street, and heard a horrible clatter. Air filter nut had been left off and the air filter cover came off and landed in the fan belt. No serious damage.