Well uni was just, sucky, still chronic pain, crappy halls with awful people who just destroyed the kitched so I settled into eating drinking late into the night, sleep till midday, eat, eat before going out and usually both takeaways

Added to little activity I got in a pretty sorry state.
I really don't know if it will get better, tbh, I also don't know how bad it is. IT was especially bad as it was both knee's, and the issue inside my knee wore down my knee cap and being it was rehab from both at the same time it was very hard to stay active between physio due to pain. Weakend muscle to track the knee cap as it should, plus a dodgey kneecap and slightly worn groves in the femur from a year of the knee cap being knocked out of place all meant that around my surgery physio was so intensely painful they gave me shots to keep swelling down and I don't know if I ever actually got enough strength in my legs to track the knee cap correctly.
At this point I'm kind of resigned to some pain, but if I lose weight and get enough strength/support into my surround muscles, then maybe the pain won't end up that much worse. There was a couple years of physio where basically it was the idea that pain would eventually go away when leg got strong enough, but they said that didn't seem to be happening and at that time, the pain was significantly worse after weeks of exercise due to swelling making everything a bit crappy.
Maybe years down the line, hopefully slightly better scar tissue, less weight, better eating, less depression(and maybe codeine) and I can break though the pain barrier to a point where its not so bad? we shall see
The other thing was, I was young, couldn't afford a gym so had, running on pavement, which is as bad as you can do joint wise, or cycling which was recommended due to low impact. But it seems its not actually the impact, its the fast movement that hurts, which is actually much worse with cycling than running in my case. So grabbing a treadmill with good support, and trying walking/running, for weight loss and knee rehab.
A lot of the depression was feeling so massively let down from doctors, if they'd sent me to the right guy a year earlier, the chances the surgery had for being completely successful would have been stupidly higher, I wouldn't have had a year of pain, knee cap/femur wouldn't have been damaged and I'd probably have been fine within months. Plus I get the feeling the physio I was sent to was fairly hopeless and gave me all the wrong advice for my particular problem and once the surgery was done my surgeon wasn't remotely interested in if I was actually ok, the surgery went well on his books, job done. oh well.