Need help feeling hopeless

I had a lateral release done on my left knee after having a shooting pain in my patellar tendon (right below my knee cap) anytime I bent down, squatted, lunged, and jumping was out of the question. It happened from doing heavy squats (around 400lbs "heavy for me") every week for years on end without a break. I suffered from this pain for almost a year and a half and tried physical therapy with no aid whatsoever, so I finally I opted for this surgery that my doc recommended after nothing on the MRI or xrays on July 11th 2014. Needless to say it has been almost 7 months post surgery, I've been in physical therapy for 3 months and I have yet to see any improvement, infact it probably is worse now that it was prior to the surgery. It blows my mind that I have suffered from this injury for this long. I haven't been able to train legs in probably 2+ years now, lost a ton of weight, and its starting to contribute to my depression. I'm now wondering if it will ever heal, I'm a very healthy 24 y/o male with no prior health issues. ANY advice on this shitty situation I'm I would really appreciate it, have I just f***** myself or is there still hope? thanks

Need help feeling hopeless