You're not being in the slightest unreasonable, but your husband definitely is. Hypocritical too if he goes out to watch football and to the gym. I'd add lazy if he watches you do every scrap of cooking and cleaning all week without lifting a finger.
I started writing five years ago and am now happily full time. I could never have done this if my husband hadn't insisted on stepping up and giving me as much time as possible to write my first few books and learn how to market them. It's turned out to be an investment for both our futures, but he couldn't have known that when he first encouraged me to follow my lifelong dream and did absolutely everything in his power to make it possible, taking on extra childcare and housework in the evenings simply because he loves me and wanted me to be happy that I'd given it my very best shot.
One thing I would say that tends to be very unpopular among creatives is that writing is as much a matter of discipline as anything. You can write when you feel ill, tired or out of sorts. At first, that seems impossible, but a million or so words later, you realise that just isn't true. The muse may be wayward and elusive, but it's entirely possible to grab her by the scruff of the neck and pin her down, kicking and struggling.
The best piece of advice I got when I started in 2021 was to show up, show up, and keep showing up. Set a time every single day and don't negotiate with yourself. If the only thing you write during that time - and it can be five minutes or five hours, depending on your circumstances - is a jumble of words, you still write them. Very soon, your brain will realise that this is writing time and will switch to that mode the second you sit down in your chair. Try to make it the same time and place every day because our brains thrive on routine and habit and it sets good neural pathways.
One of the things I did when I started was to create the habit of not allowing myself to get out of bed until I'd written 200 words. Nowadays, that only takes me seven or eight minutes. It's a great time to do it because your brain is in flow state the moment you wake up, and you are at your most creative as long as you don't speak to anyone, look at your phone etc. Read about morning pages for more detail. I used to do those before realising that time would be better spent getting my creative writing done.
The point of that particular exercise was that I realised if I did it every single day of the year, I would have a whole book written by December 31st without even trying. Wich meant that if every single other thing went wrong that year, I'd still come out of it with at least one novel. It's easy enough to edit those words while watching TV with your husband or whatever else it is you do in the evenings.
Nowadays those 200 words almost always turn into more, but my brain knows it has permission to stop the moment I hit that set word count. It works very well to gamify things in order to keep your brain happy. I also have a document on my laptop where I keep a tally of my exact word count every day of the year and add it up on December 31st. It's quite inspiring. These days, I reserve the morning 200 for any spare book that takes my fancy outside of the two series I write in order to pay the mortgage and bills. It feels like I'm rewarding myself for my hard work during the rest of the day and get to try new ideas and genres risk free.
Tell your lazy husband that you ARE going to do this and he IS going to stop sabotaging you. If he loves you and wants you to follow your dreams he is now going to start cooking dinner three times and week and cleaning up after himself. Also picking up a few household jobs. He's an adult, and no adult should be swanning around the house expecting a woman to clear up after them. If he has time for football and the pub, he has time to fold and put away a few clothes each week. TIme for you to be more assertive here. Tell him how you feel about him sabotaging you with his neediness. Tell him exactly when you will and won't be available, then ruthlessly take the time your creative brain needs in order to feel fulfilled. Don't wait until your forties or fifties to follow your dream.
Join a few FB writing groups. I started with 20 books to 50k, without whom I would never have succeeded, and whose amazing Vegas writing conference seminars are free on YouTube going back years. I then added FB groups for the two genres in which I write. Another thing I find useful is joining online writing sprints with other writers around the world. There's always one going on in a time zone that works for whenever time I want to write, whether it's lunchtime or three in the morning. Practice really does make perfect. I can easily write 2000 words an hour these days and always make sure I do. It's hard at first, but now the words flow thick and fast. Purists will say that you compromise quality by learning to write at will, but my readers disagree, and my income is a reward for listening to people sit and snipe from the sidelines.
It helps that I realised early on that traditional publishing wouldn't give me enough money to live on, so I started my own business, worked until I dropped for the first three years, then settled into a proper forty hour week. I now even give myself paid annual leave and sick leave!
Please don't give up your dream. It takes a massive amount of work and determination, but there's nothing like realising you can pay your bills by making up lies for a living, as someone once called it in the book Writing for Pleasure and Profit. And you don't have to retire at the end of it. I intend to keep writing until I drop because I earn money doing the thing I love most in the world. If you want book recommendations to help with your craft or any other writing group suggestions, please just say. The very best of luck to you!