Please don't hate yourself. You sound as if you are studying for A levels now - this is a time for finding out about yourself, your strengths and also who you are not.
There is so much pressure these days to follow the expected path - working hard at school, get place at Uni, work hard at Uni . . .etc etc.
I did all of those things and it took me years to find the career that I love - which required far fewer qualifications. Maybe this is a dream university but maybe there are other dreams to pursue. If this is your dream university and you really wanted/needed to go there, you would probably be much more motivated to do what is needed.
Work hard by all means. And yy to checking out ADHD in women. But there's an old MN saying, which is if someone tells you who they are, believe them. If you are dodging deadlines, and reluctant to get down to work, maybe you are not going to be happy at Uni. Maybe there's a more structured career out there for you in which you will excel.
Don't give up on yourself. Give yourself every chance to work hard, and if you really want to get to Uni, maybe you will. Teachers stress the importance of meeting deadlines, but people who miss them can sometimes still do really well. However, if you end up somewhere else that's OK too.
And well done for posting here. There are some wise old folk here and often someone will say something that really helps.