Have you tried changing
input_up_axis = "-32767"
input_down_axis = "+32767"
input_left_axis = "-32767"
input_right_axis = "+32767"
to
input_up_axis = "-1"
input_down_axis = "+1"
input_left_axis = "-0"
input_right_axis = "+0"
The only other difference on mine, is that my first line says
input_device = “USB Gamepad ”
rather than
input_device = “USB gamepad ”
but then I think thats specific to my controller so I wouldnt worry about that.
If you manually change it to the -1 etc.. above make sure the quotes are just as the other examples in the file (or just dont change them basically).
I’m assuming you havent changed anything in any of the retroarch.cfg files.