Two things, one ... the quality of the teams you lost to is substantially better than the quality of those you won against by and large, which skews the stats. Honestly, the rest I'd chalk up to bad luck. I've had seasons where I went 0-9 in games of three points or less. It happens, things don't bounce your way.
If I had to home in on one thing to try to improve to help, though, it would be finding a way to lower that turnover number. MAybe lowering Libby's distro a bit and upping someone else's.