I've never used a computer that didn't have occasional hiccups. The Mac I have for work has lots of weird bugs. One is that if it has been using WI-FI and I plug-in my dock with an Ethernet cable attached, I lose internet access because MacOS can't gracefully handle the new interface becoming available.

I also find Apple's choice to just continually create 1G swap files until the system locks absolutely baffling.

By those standards neither Mac nor Windows just work. No modern OS expect maybe ChromeOS just works.