Port Power has a Large Voltage Drop

[SirJaredSalty]

Maybe less of an issue and more of something I don't understand. Measuring the voltage at the port power when no physical controller is connected I read ~2.2V. A large drop already. When I plug in an old knock off gamecube controller controller the output port voltage drops again to ~1.6V. The port sense works as expected. But how is the gamecube controller operational at such a low voltage when it is supposed to be supplied 3.3V? I understand there's a voltage drop across the diode PMOS, but not understanding how this is a good solution if the voltage drop so much. Appreciate any feedback.