AA hands - 2 big losses - am i playing badly here??

[Jeff76]

SPR is only measured on the flop. This is because it is mainly a tool for planning your hand. You plan for SPRs you'd like before the flop, and then you plan how you will play your hand based on the SPR and hand you have on the flop.

You haven't read it, I strongly suggest Professional No Limit, vol 1. Very good poker book.