I am -19 buy ins from all-in adj in 50k hands, is this common?
How bad is this?

Not very. However, once others know you're running bad, you need to (sadly) tighten up as running bad tends to make you make bad plays. Sad, but true.

50/50

It isn't common, but it happens. Especially only looking at all ins which is a much smaller sample size and variance can be much greater.

Someone has to be on the extreme outer edge of the variance bell curve. Might as well be you.

It is uncommon but not unheard of. I am in a little bit of the same situation since I started plying NL50 in August. Over 16,000 hands I am running about 14 buy-ins below EV, and in September alone I have run nearly 17 buy-ins below EV. Every time I think things seem to be changing it goes for a **** again - twice in the last few days I got a guy all-in post-flop with 80%+ equity only to lose on the river.

Honestly, I'd rather just get it in bad and know that I screwed up than constantly making good decisions that lose me money. I am running 12+ bb/100 but have nothing to show for it - I want to try moving up in stakes but I can't do it when my bankroll is never growing.

Here are my graphs for August-September and for September just to make you feel better that you're not alone here.

Bad plays make you run worse. Try to win by folding more rivers. Move up, get respect.

What? I'm guessing you aren't much of a winning player. Baring whiffed draws, if you call the turn, you should be calling most rivers. It's the turn where you should be doing more folds.