It's not fruitless! I'm in my 4th and final year of an undergrad dual degree with double majors. There were times where I've had a lot of difficulties - either depression causing me to procrastinate too much, not go to class etc or assignments I loved so much and wanted to be perfect it would send me into an insane manic episode.

The one thing I think if I could of changed is when I started my degrees would be to use the university student services more. I know now that I could of applied for consideration on my grades or additional extensions due to being ill. But again, I wasn't seeking treatment back then either so battled through it, pretending it was normal. I haven't ever failed a course though so I think if you do have a interest to learn, you will make it out the other side.