DING DING DING!!!
This is the precise reason you are seeking joint custody.......no offense home skillet, but GROW A SACK. There is no way this isn't going to suck.....no way. You can't make it better....PERIOD. What you can do is look out first and foremost for your daughters well being, and to do that, you need to protect her from those that can hurt her.
Here's the bottom line: Being a single parent is hard, and I have seen so many of my friends go through this same line of shit....this city breeds it. That being said, it's not impossible.....you need parenting advice?? I'm off of Wildhorse, come on over......I've got three little balls of estrogen running around my house acting like they already have daddy's credit cards.
You need help, there's no doubt, but the situation that your soon to be ex-wife has put HERSELF in, takes forever to get better.......and so much damage can be done in the meantime. You know the role homey.....you've seen it first hand.....we all know the same 30 something skanks still doing the same ol' bullshit.........where and when do you think they started...?? Do you want to try and deal with that shit for the rest of your life....??? I
All this being said, I don't know you, and I don't know your wife......but I know the situation all too well......
As you already know, being a dad is the absolute greatest gift in the world.....don't be scared dude........you CAN do this all by yourself.