supercapacitor - P MOSFET turning on before gate threshold

I was simulating a P MOSFET, and for turning a P MOSFET on we need gate to Source voltage less then its threshold voltage. as per below simulation circuit at start VGS= 0, then there is no way mosfet get turn on,because it need at least -2V as per datasheet gate thershold to turn it on. but simulation i am getting 4V arroud, whats wrong here.

Some Might say i applied voltage VDS=5V but for P MOSFET it should be negative, but i saw some circuit where they used this type of connection where R1 is just replaced by a supercap.