You did the absolute right thing. You know how teenagers scream "I hate you" when they aren't allowed to go to the movies or talk on the phone? It's their way of really getting to their parents. My son is still a toddler but I know when he says that to me it will be devastating.
Your son acted that way specifically to get at you. You know the way you behaved at the house was bad for you. But overall, you putting your foot down and protecting not only yourself but also your grandchild and daughter is the best thing in the here and now. Stay strong and remember to take it hour to hour if necessary. Hugs!