Yes, after much research, I've decided it wasn't REALLY my fault. The adapter should not have failed, because it never should have tried to supply my phone with more than 500ma in the first place. It was just cheap circuitry.
Incidentally, one of the things I like about motherboard is that Gigabyte has seen fit to exceed the USB specifications. The front USB ports, in addition to being able to charge a device while the computer is off, can put out more than 500ma. 1500ma to be exact! That's enough to power just about anything you could think to plug into it (according to this anyway...)Anyway, it's great for me as a vaper. Fewer adapters to keep track of.
That's a USB 3.0 mobo. Very nice. I haven't upgraded to 3.0 yet, as I don't have any devices that support it, but my next mobo will be sure to have it. The transfer speeds are obscenely fast in comparison.