I'm not trying to blow sunshine up your skirt, but sometimes things end in order for something better and more satisfying comes along. I hope that is true in your case! I've lost a few jobs to bp. It was the exhaustion that comes with depression that did me in. On my last, and best job, I was graduating from crutches to a wheelchair for life. After that, I just gave up on work and live on SSI/Disability. That's me, though. There are many great attorneys out there who are well versed in the ADA and helping people with disabilities of all stripes. I would suggest consulting one. On the face of it, your argument does have merit, but only an attorney could tell you if it is worth pursuing or best to move on. I wish you all the best and don't let this bring you down!