Teh Diabloz!

You're clearly doing something really wrong if you can't solo normal. Unless you're a demon hunter. Then you could run into some trouble.

The only thing you could be doing "wrong" is not buying items on the AH. Let's see you solo normal without buying anything from the AH or transferring items from your alts. I hit a brick wall with Belial on Normal which forced me to buy items on the AH, and most of the way through Normal I didn't even find any upgrades.