Could all these issues have anything related to cramming a motherboard, fan, WiFI, Bluetooth PSU into a small aluminum block? I sure see several Mac Mini's on Apple's refurbished site. Problems seem to have increased with the new smaller model for some reason.
While the Apple Mac mini is an incredible little computer, it is not immune to issues. A recent report by AppleInsiders has discovered a plethora of users complaining about reliability with USB-C connections, although the culprit is yet to be identified.