I should clarify. I may have come on overly critical at first when I was in shock that someone else had such a totally different experience, but even then, I was willing to accept your experience at your word. Now I'm trying to collect information to investigate why our experiences diverge so distinctly.
Definitely a possibility, as ALL of my personal USB-C equipment experience has been with Nexus 6Ps or chargers purchased from Google. I've got cables that I picked up elsewhere, but those are the only exceptions. The micro-USB gear covers a much broader spectrum in every direction. Nexus 7 tablets (2012 and 2013), Samsung Galaxies (2, 3, 4, and 5), other Samsung and LG phones, a Samsung tablet, etc. I'm probably forgetting a few phones from years back. There have definitely been micro USB devices I've had that exhibited this more than others, but all have been more affected by this than any of the 6Ps I've had experience with.
Whatever issue I'm seeing, I strongly believe it to be wear and tear related. When a device is new, just about any cable will work reliably. The older the device gets, the pickier it gets about cables and the faster new cables stop working with it. The fact that my roommate that puts his devices through the least stress has the least problems is another indicator in that direction. I almost never see him using his phone or tablet in a cluttered area of the house, so accidents are far less likely to happen to his equipment.