"a really bad day" is NO excuse for what Ryan did to that woman. He has given himself permission to show his ass, and threaten whenever he feels like it; if she makes excuses for him, she just reinforces his sense of nasty entitlement. He'll flip that around onto her, eventually, if he hasn't already.
And I'm pretty sure that Judy had taken off her shows before she put her feet up on the couch, and she pointed that out to him.
And a child would rather be FROM a broken family than live in one. It's not worth seeing your child turned into a nervous basketcase just to maintain a home with an abuser....and what Ryan did was ABUSE.