If you're going to post openly in a public place that your husband forces you to do an unfair share of domestic chores when you also run a business and consistently belittles your creative output and calls it "pointless", which is very insulting towards you as a person, it sounds like a horrible situation to be in, and yes, it does constitute emotional abuse. The sheer intensity of how you write about it gives the impression that his behaviour has really upset you. I'm a little baffled and concerned that you expect people to read the things you wrote and to be like "Well, she said she doesn't want advice, so I guess I'll just leave her to suffer. This seems like a totally normal, healthy marriage." What you're going through shouldn't just be business as usual. Having to do your writing in the middle of the night because your partner is so opposed to it and also expects you to do all the chores while he watches youtube isn't normal.
I've been engaged to my partner for about five years now (wedding postponed due to Family stuff and Covid) out of the nine or so years we've been a couple, so actually, yes, I do know what it's like to be in a committed relationship and to work at it, and I know that splitting up after a long time together wouldn't be easy and shouldn't be approached lightly. But if my partner said something like that to me even once, we'd be having some serious discussion, never mind repeatedly, and if they consistently behaved like that with the excuse of being "old fashioned", I'd be packing my bags, 'cause that's not a good enough excuse! He can be politically conservative and old fashioned and still respect you like a good old fashioned chivalrous gentleman. He can privately think spending time writing is folly and still respect that you deserve time to do it just because it makes you happy and he cares about your happiness.
If you don't feel it's bad enough for divorce then okay, at least talk to him. If he can't sit and listen and understand when you say "Honey, I love you, but when you call my writing pointless, it upsets me. My writing is very important to me, and you might not feel it's valuable because it doesn't make much money, but it's still a really important part of my life for my emotional wellbeing and I want you to respect my writing time." and then change his behaviour, then he is being a bad partner. A small amount of space and time to do some writing is not an unreasonable request.
Disregard what I'm saying if you so wish. I can't force you to do anything, but I want you to know that you deserve to be treated better. You deserve respect from your partner and you deserve space and time to devote to your writing. I know it can hurt when somebody else says a partner is treating you badly because it can feel like a judgement on you as a person. I'm not judging you here and I don't think his behaviour is your fault or that you're weak for being in a relationship with somebody who's behaving in a toxic way. All I want you to know is that he shouldn't be treating you like this. It's not okay for him to treat you like this.