Don't mix 6-max and full-ring stats.

IMO analysing these stats for NL is not that useful, I just look at VP$IP, PFR%, BB/100, Won $ at SD. Trawling through your HHs and analysing hands (in a non results-orientated way) will give you a better idea of what areas of your game you need to work on.

Your Won $ at SD % is less than 50% -> maybe you need to work on your hand reading skills? Over 7k hands(just 6-max, bit of a small sample though) mine is about 54%... 6-max will put you in a lot more tougher situations and force you to improve hand reading, using position and adapting to opponents so I suggest you play more 6-max to improve your skills.

Here is a challenge for you: Write down what you are doing better than your opponents to maximise your winnings and minimize your losses ie reasons why you deserve to be a winning player. Evaluate how well you are applying these concepts and how often you stray from them. Look for more ways of gaining an edge over your opponents. Think about situations that get you into trouble and how you can handle these situations better. Just keep working at your game, results will follow.