I had a customer come in one morning steaming mad and demanding a refund for her new macbook. She was mad because (to paraphrase) she has been told that she wouldn't have all the problems and crashes her windows machine had and wouldn't have to deal with viruses and a host of other windows specific issues if she used a mac. But after a few weeks she was still having all of the same problems. The more she described the issue, the more it sounded like she'd never even bought a mac, but here she was with a 3 week old macbook in a box. And beyond that, she described having some hardware issues that had been corrected with a firmware update months earlier. The first boot and software update should have corrected all of that.
So I asked her to show me some of what it was doing. She took it out of the box, switched it on and it booted right into windows. And then proceeded to dump a ton of malware popups all over the screen just as she'd said. It turns out, she did indeed buy the macbook 3 weeks earlier, and then gave it to her "computer smart nephew" to setup for her. Well Mr. Nephew apparently decided in his infinite wisdom that is aunt didn't need macOS, she just needed an expensive windows machine. And so he'd downloaded bootcamp, shrunk the macOS partition to the smallest size it could be, and then installed windows and configured the machine to boot into windows by default. She'd never used macOS and didn't even know it was there, and so had never gotten the firmware updates for the hardware, and was of course having all the same problems she had in windows normally, because she was still using windows, only this time without any malware software because "macs don't need Norton".
The end result is I showed the customer what had happened, got them squared away with the mac OS side an asked them to give it a try for a few weeks with a personal guarantee we'd return it if she still didn't like it. She became one of our best customers. But the moral of the story is twofold:
1) Not everyone who uses tech makes the decisions for how that tech is configured
2) "no support" is a good way to ensure that those #1 people hate your product