I had no motivation. I didnt want to do a rubbish dissertation where my topic was 'Show people pictures of things that cause allergies and see if it triggers an allergic response' (given to me by my dissertation supervisor).
I wasnt aware that I wouldnt be able to work a year after I finished uni, I entered a full time job at Asda while trying to find a simple tech support / call centre job (there were several such places available where I went to uni, but I didnt hear back from any of my applications). Failing that I was going to try and get a simple receptionist job at the NHS before I ended up getting too ill from my hearing + balance disorder.
I had no motivation at all to complete the final year of my degree. My lecturers tried very hard to convince me to complete it, but I just couldnt get myself to do a single thing towards my dissertation beyond the initial 500 - 1000 word research proposal to carry out an Eliza Assay test on blood samples, which was accepted by the university, but then declined by my dissertation supervisor because the equipment it needed was too expensive. TBH thats was probably a good thing, because if they had wasted however much it cost to get the kit in, I probably still wouldnt have had any motivation to do it.
OK, that is fair enough. I can empathise with not having or not being able to find the motivation.
Given your circumstances would it be something (studying, maybe OU) that you would consider doing again?
I found it to be rewarding and helped me deal with a lot of issues I had after I was forced to leave the Marines.