Hello,
Blimey, it sounds like you've had an incredibly tough journey, and you've done your absolute all to try and get bf established. I can only imagine it is harder than ever before at the moment, given the lack of support currently available.
My situation is a bit different, but my experience;
I was desperate to ebf. Read everything possible before DD was born, wouldn't entertain formula / bottles in the house etc, was very clear that I would just make it work.
Then I had a rubbish labour, emergency section and both DD & I were in for a week. Nothing too terrible, but it was hard. I managed to get bf going, and she was actually gaining plenty of weight. Despite gaining well etc, it was just relentless- constant feeding, screamed if she left the boob. I got to 6 weeks and just cracked- I couldn't do it any more. I was starting to resent her, and was not enjoying any of motherhood. I switched to formula (and had the wracking guilt, tears, feelings of failure) but my GOD it was the best thing we could have done for DD (and me!)
She was far more content and happy. Fed 3 hourly ish, happy in between and I could enjoy just cuddling and talking to her, as well as little trips out. I was much more well rested, so felt better in myself too.
DD is about to turn 3 and is a picture of health - very rarely ill, regulates her eating etc very well and eats a varied diet, and is bright as a button. I'm due another DD in August, and will be preparing with formula etc at home. I'll give bf a go, but will not put so much pressure on myself if it is as difficult next time. It ruined my first weeks with DD. Formula saved my sanity, and finally helped me enjoy motherhood.
Wishing you all the best with your new little baby.