4pcs USAQ 5010 Brushless Motor 750KV 2-6S High Torque 14-16" Propellers

Now the third box of 4 motors I have bought of these same motors... so far each box has had atleast 1 bad motor in it. This recent boxhad two bad motors, and the wire wrap in the motors were thinner wire then all the others... 1 motor that was bad had some of the blue adhesive putty that holds the magnets on up in the motor itself, pictures attached... starting to get very bothered by the motors from USAQ, so far 4 of the 12 motors I have ordered have been bad, 1 was completely seized, 1 grinds badly and vibrates and heats up, 2 at tight and only spin half as fast but heat up extremely fast, sometimes smoke...

I was wondering if I'd done something wrong but after reading this review I can see I'm not alone. I've bought several of these... they're powerful and cheap but half of them have gone bad. Yes I'm using 6S but only 13 inch propellers... Maybe these shouldn't be rated 14-16inch and 2-6s. More like 2-4s and 14inch max. I seem to have overloaded these multiple times but I'm barely hitting the middle range of their claimed capabilities. The winding on mine has also varied, it's come with inconsistent screws... I want a refund.