I watched the match and from what I remember, NONE OF IT WAS SHAWN'S FAULT.
HHH tore his titty off the bone. Taker and Kane are two broken down giants and were barely in shape.
Shawn could still hit all his moves and fly through the air no problem. Shawn said for his little return with Austin and Foley that he knows what's expected of him and he puts all the pressure on himself to make sure he's in perfect shape to do whatever it is he needs to do.
Too bad Taker, Kane and Trips didn't/couldn't do the same.