Everything else aside.
Your husband sounds like he is not happy you are (finally) being assertive.
He didn't forget what he wanted to say, he was bored of listening to you, decided to go to bed, left you an instruction to stay up and text son, so basically you worry I am going off to do what I want because I am in charge and when you said text him yourself if you want him to be texted he went nuts because his house elf is faulty.
I would carry on being assertive make a note of his reactions on your phone, as a reference list, if he uses each any every time he forgot what he was going to say, suggest he goes to GP for early onset dementia tests. But we all know he hasn't forgotten has he? He's being a nasty prick, because his house elf is faulty.
I understand you all have a lot going on. But shouting fuck off isn't going to help.
I also if I were you keep each comment to the situation at hand.
And no I wouldn't make him coffee, calmly explain you don't make coffee for people who tell you to fuck off the night before, or say from now on you won't if you have in the past, and never will, will again. Just to make it clear in his head that coffee after that sort of behaviour is no longer an option.
I have a feeling OP this is going to be hard for you. He isn't liking this new assertiveness and never will. I think you will come to a conclusion that you are either with him and a doormat or not with him.
But it might be different just have to see how it goes.
Or you decide you just don't want to be with someone who isn't there to live and support you, listen, chat, laugh, cry together. He sounds like a terrible husband. My H will sit actively listen to me talking about colour wisteria I want to get if I need to. I am sure he couldn't care less about the colour of a potential wisteria but he listens.