Well, I know you said you didn't want anything specific, but you could use the Easy Campaign, making them suck, but if they suffer a death of a unit, you create a ton of units for them at their base and use the script "Send All Units On Strategic Suicide Missions". Also, you could make it so when they suffer a death, it changes their campaign from Easy to Insane. I say that because I don't know of an AI script that makes them get pissed when you attack them
