I'm, just gunna flat out say it... Farming gear before hell is irrelivent. You may need to if your skill level is high enough, and that may be the case with some people, but with 90% of players you are able to go through normal and nightmare without any farming at all. I've done so and so has pretty much everyone else. Farming only becomes necessary in later hell and inferno difficulties.Quote from Bloccstyle
You're having problems because you aren't geared enough. If you're in hell already you're steam rollin through the game and not farming enough.
Builds are important and some are better than others, but that won't mean jack if you're undergeared. However good you think your gear is, it's not.
People that are already in Hell just play more than you... that's all there is to it.