Alot of things wrong with your itemisation and your skills and passives.

Items you generally came up from Hell to Inferno, the difficulty curve increases exponentially and it happens when you go from Act 1 to Act 2 in Inferno as well. So you lack core stats to begin with and you still have a piece of blue with you. It shows that you're not properly geared for Inferno yet. Then moving on to your skills, you got Rend / Provocation / Ignore Pain as your defensive skills, and you got WoTB / Earthquake as your offensive skills. You got two of the longest cooldown skills for a Barbarian as your offensive skills and you got three self-healing mechanism. You took too much skill slots for too much unnecessary stuffs. I recommend if you're going for slice and dice build, just concentrate on one escape mechanism and one self healing mechanism ie; Provocation & Sprint. That should increase your survivability for starters. Then for your offensive skills, take Bash / Warcry / Battle Rage / Hammer of the Ancients(for a dependable fury burner). Your rend will not be able to offset the insane amount of damage that you receive due to your low DPS and your HP is too low for even for Act 1 I'd say. If you cannot progress through Act 2, then stay at Act 1 till you feel comfortable with your equipment to progress through it. No one finishes from Hell Act 4 till Inferno Act 4 in a day. 

Build up your core stats then aim for life on hit. No point going for critical damage if you don't have that critical rate to go with it. If you want to go down the critical rate road, it's going to be quite expensive and not recommended for beginners. Also, the rule of thumb is to get more All Resists. It's quite cheap these days with the market going haywire for high end equipments. Grab a few equipments with more than 50 All Resist each with slightly lower core stats. Also, try get 3 slot chest armor preferably. Weapons try put slow weapon as main hand, and fast weapons as off-hand.

As for your passives, I recommend more survivability via Weapons Master / Nerves of Steel / Brawler or Ruthless interchangably depending on what situation you encounter. Since you're going for a slice and dice build, I recommend Brawler as they'll always be more than 3 hitting you where you need that extra boost of DPS and if there's less than 3, I don't think you need any extra help to finish them. Mobs, elites and champion packs always come in a gang of 3 or more unless it's a range douchebag mob that kites till the world ends.

This is a bit of a late reply, but i noticed that you're using a scoundrel for soloing.  Most barbarians will use the enchantress and that's my preferred choice as well.  Have a look at alternate specs below.

http://us.battle.net/d3/en/calculator/foll...3;0110!0110

basically the rationale is, your followers are not damage dealers they provide useful buffs and to add their magic find/gold find to yours.  The enchantress' buffs really do add to your survivability.  You do need to get her to level 60 though.

I've also added a spec for the scoundrel that i think has better utility.

gems if no money don't upgrade first. go for strength gems.

u r the 1st barb i see having so much intel stats, higher AR?

are you tank or a dps? and what's up with all the int items?

10 int = 1 AR. I think that's too inefficient to stack some AR. You would be better to with buying low core stat and medium high AR equipment. Your passives tells me you are a tank lol