Do you by any chance happen to own a (plugged in) VR headset or another device that would consume a lot of USB throughput? I had the exact same issue with my g502 and my problem was that I had plugged in the headset into a port connected to the chip set rather than the CPU directly.
To diagnose, try unplugging every USB device you don't immediately need, that sort of thing.

Not only are the disadvantages many, but what the fuck even is the advantage?