Really? I don't remember this, I usually play RTS in maximum difficulty (I remember SC2 on Brutal had some challenging scenarios, as it should be), and still I thought Normal in 0 A.D. wasn't the usual Normal. I doubt it's my imagination, newbies have mentioned this plenty of times, and even the game itself states "the default AI level is quite challenging for new players", which shouldn't be necessary to state if it was a normal Normal.