Hi Sweetteewalls,
I'm really sorry you listened to all his rantings. I know that must have hurt.
Perhaps the first thing you could have done would have been to hang up when he started in with all that bilge he was spewing your way from somewhere within his fantasy world.
Second lesson might be to never, ever, rely on an active alcoholic for anything (childcare, responsible behavior, anything). Do you have some other arrangement you can make for your child's care for the four hours before you get off work? If you can't figure something out for today, maybe that's something you can work on for the future.
All that trash-talking by your stbx is just that. Nothing based in reality. It is a reflection of the kind of person he is, not the kind of person you are! I hope today will be a better day!!