The thing I hate about auto-resolve is that it gives mewling little incompetent armies incredible kills against my army.

Once, in Spain, I fought a 1200-strong Spaniard army with my own Roman one of similar strength. I lost one man to the Spaniard's 1000 or so. On auto-resolve for that same battle (after I loaded it back up) I lost 200 men and only killed 500 of the enemy.