[YMAA]

Typically one of three things will cause the clutch to fail prematurely:

1) Aggressive, hard driving
2) Inexperience leading to excessive slipping of the clutch
3) Manufacturer's defect

Only you'll know best which of the three is most likely in your situation. I will say that while many believe that because this is a sports car it is intended to be driven like a sports car (and I'm one of them), when it comes to warranty claims Subaru is known to use that stereotype to deny warranty claims citing aggressive driving as the reason. Take from that what you will.

Hopefully it's the manufacturer's defect as the first two possibilities will be tough to convince the dealer or SOA to warranty. Best of luck and I hope your car is road-ready quickly and cheaply!