This is just my two cents, but I've not had good luck with 3.0 cables. Sometimes the controller wouldn't be recognized. I ended up stuffing them in a drawer and getting some 2.0 cables. They were the cheapest 3.0 cables on Amazon, so higher quality cables might work fine. I eventually got some 8bitdo wireless controllers. They can sometimes be a headache, dealing with bluetooth issues. But the tangled up extension cables were a bigger constant headache.

@red2blue i use a 13 port usb 2.0 with a 2.5 amp power supply running 11 devices on my pi, so 7 ports with 3 amps is as good as you get, as long as the power supply saying 3 amps isnt a lying pile of junk.