Like leftfoot said, you need more legs. Specifically, you should add squats in because they're an awesome workout for...well, everyone. When you do them correctly, squats work a ton of muscles in the body. Also, I'd suggest adding some pullups and dips into your routine. I've gotten so much stronger from doing them.
For your bentover rows, I suggest starting off with no weight and teaching your body proper form. Focus on getting each section of the body( legs, torso, arms) in the correct position, then do the movement with no weight in your hands to feel how your arms and back should pull the bar towards you. Now add weight that you can do, and repeat. Slow and controlled movement throughout.
If you want to work shoulders just add in some upright rows and overhead press. You don't have to focus on them too much.