Are SnG's the worst way to play with variance?

[ace_in_the_hole]

I have just completed 100 10+1 Sng's on party. I know this number means nothing but,m I currently have a negative ROI: -4%. Could it be that I am a good winnign player still or should I go back to NL ring games where I was at $3/100 hands which at least is prfitable.
What I am getting to is, for people who play these thigns for a living, is a negative ROI over 100 SnG's nothing to sneeze at or do I need to do some mroe work on my game. 4th place is my most common finish and many of these bustouts were AK vs A8 scenarios wherr the river is an 8 and so on.. I ahve never gone more than 9 days witrhout a winning day until these daMN sNg'S