Perhaps. From my understanding, the Marines vastly underestimated the Fallujahn insurgency and went in a little flat footed. By the time they were prepared to wipe it out with overwhelming combined arms force, political resistance inside Iraq (not here) force Bremer/Sanchez (and in one report Rumsfeld) to pull the cord on the attack.
"A little flat footed"? It is called the will to win, they (Fallujahn insurgency) have it, we (civilian leadership) don't.