I got a low 2:2 average in second year and a 3rd in third year, and managing to bring it up to a 1st overall, just, by resitting third year with a 77 average. I just need to keep it up in fourth year.
I got a 2:2 primarily due to mental health and alcoholism, which ruined a number of parts of my life for a few years.
It's not easy, particularly when you're in recovery and the odd slip-up can happen and it only takes one slip-up for things to spiral again, and it certainly requires motivation, but it feels so good to go back to getting good grades. Sure, grades are far from everything, but for me it's been a pretty solid measure of control over my life. If I'm getting 70+ in modules, then I definitely have a greater level of control over my mental health and addiction than I did this time last year or the year before.