Almost hitting my two year mark on weight lifting

5'9 160 lbs

Flat barbell: 185x13
Incline barball: 150x10
Flat Dumbbell: 80x11
Incline Dumbbell: 75x8

Deadlift: 225x9
Squats: 225x11

Dumbbell presses: 55x15

Wide Grip Pullups: 9
Underhand Grip Pullup: 17

I feel like my back is my weakest point... and yes I have shorter arms and legs.

I workout by myself, so I can't go super heavy to improve strength.

Rate my strength from 1-10; constructive criticism would be great, do you feel like I should have been stronger for lifting for 2 years?