So, your -13bb/100 non-showdown is really on the lower limit. With such a non-showdown line you'd expect to have a showdown line of around 20bb/100.
You mention tightening up with river calls. I don't think this is the problem. Your river call efficiency is over 2 which suggests you are actually calling too tight in a lot of river spots.
Your cbet flop and turn look normal, but again, for a guy playing much tighter. With a wider preflop range you can't expect to profitably defend the same percentage of your range as you would a tighter range. I suspect a lot of aggressive dead-money is going in on flop + turn and then losing at showdown. Cbet flop + turn should potentially be lower to reflect your wider preflop range.
Difficult to say specifically what your W$SD should be. Different for different styles of course. Your current W$SD does not concern me though. It takes a reasonable degree of skill to play with a 10% 3bet and 28% preflop range at these stakes. I would be more concerned about how you are playing specific hands rather than focusing on a single stat.
While potentially profitable there is really no need to play so loose at these stakes. Mainly you can just play thinking-TAG and these guys will donate. You are likely making life difficult for yourself at the moment.