Stopping breastfeeding cold Turkey / switching to formula

Hello I absolutely HATE breastfeeding, as background my little one is 8.5 months old and has various allergies - gluten, milk, nuts, oats, eggs and many more. I have to eliminate all of these from my diet due to the severity of his reactions. He is able to have soy formula which he refuses due to the taste and hatred of bottles (tried various bottles, warning teat etc and he hates even breast milk in a bottle). Tried sippy, open, 360 cups too with him taking max 60ml. I want to stop breastfeeding desperately as it is taking a huge toll on my mental health. I don’t get to sleep as due to his skin he has to be held to sleep and wakes every 30/45 minutes and I have to go to bed at 6:30 every day like a child and have done for 6 months. I can’t eat, can’t sleep, I have 0 alone time, it’s a luxury to have a shower and I’m constantly panicking if it’s something I ate making him worse and discovering more and more allergens. I’m wanting to know if any mummas out there have quit cold Turkey and continued to offer formula and had any success? I don’t want to jeopardise his health but I’m desperate. He eats 3 solids meals a day, a combination of purée and blw and does pretty well with both. Thankyou, please no negativity. I’m really struggling and just need help or ideas please.