Excessive alchoholism and childcare are completely incompatible and a risk for the dc.
But to then turn this around on OP by calling her nasty names?! 
Dick moves.
He had dc that he was responsible for before he went out and drank himself blind to the point of vomitting.
At that point he can't have any any idea which way things would go.
When you've had that muc to drink you can be completely unrousable, so he's absent for the purposes of keeping his dc safe.
To then turn around and call OP 'controlling' FFS! He's the one with all the control here, what a joke!
She has no control whatsoever, that much is blatantly obvious. If she had control this wouldn't have happened.
He's the controlling one, and all his family are being subjected to his controlling behaviour, they all have to fall in line whilst he does whatever the fuck he likes.
Yes, he managed to get up to give them crisps. Excusable if you are genuinely ill, but to have drunk yourself into a state of drunken vommitting and then walk away from the vommitty bathroom?
I don't think I could have gone to work and left my dc with someone that drunk and irresponsible.
But, when you live with someone that turns their poor behaviour onto you, and blames you instead of being responsible, might have something to do with OP feeling that this is normal or acceptable behaviour
Anyone who disagrees with the way her H has behaved wouldn't be here asking if they were being U, but taken steps to put an end to it, to make sure her dc were never intentionally left this way again.
You are overwhelmingly supported in your view OP.
He's a selfish manchild.