I don't have an rMB, however that does look very strange to my eye. Can you share a photo of how you typically wrap the cord?
All of Apple's cables are overpriced dog poop since they make them cheaply and biodegradable. One area where Apple couldn't care less about quality, unfortunately. Third party cables are the way to go.
I detach the cable from the charger and coil it in a loop aprx 6-7" as there are significantly more lines in USB C than the previous standards, nor are the cables currently ubiquitous. Personally I would avoid "kinking" the suppled cable for obvious reason.
Q-6
Well I don't purposefully "kink" it......... I've wrapped it the same way as I always have, just seems to be poor cable quality.
I don't think it's the biodegradable part that makes them crap, it's really more due to the fact that they're thin and have poor stress reliefs...All of Apple's cables are overpriced dog poop since they make them cheaply and biodegradable.