I feel so bad for that kid that she's being forced to parent her parent. Why is she with him, anyway? What mom decided, "Yeah, I know my soon-to-be ex-husband gets drunk and is a sad drunk, but he wants his daughter for the night, so..."
I'm also wondering where the other two kids are. He said his 'pack' includes three kids, but he only mentions the daughter in this story. There are two possibilities I can see here:
1.) The other kids are smart enough to know not to hang around when their dad is crying into his beer and ranting, or maybe they're there, but young enough that they don't understand what he's doing and the eldest one has taken it upon herself to keep him distracted so they don't have to see it.
2.) The other two kids are boys, so maybe OP feels he doesn't have that special girly connection with them or whatever. Or he, probably believing in all the stereotypes about women and girls, simply thinks that he needs a caregiver right now, and who better than the 11-year-old daughter?
Both of these point towards his awful parenting, and I hope those kids never have to see him again.