I once saw a study that was following a bunch of people through their academic path, and six out of seven of the people who were diagnosed with ADHD never finished college. Granted, this is just one study. But like, jebus.
I too failed to finish my degree. Some classes I had to take three times before I succeeded, others I tried four times and never did. I put a lot of effort and it result in nothing. And I am so ill equipped to enter the workforce. I got fired or quit all but one of the jobs I had.