I wrote a response to this and lost it somehow :|. Short version - quit ssri's in about 2007 after continually getting worse starting with just mild anxiety. Tried again (viibryd) for a few weeks while not even depressed in 2013. Suicidal within a week. Went off that after about 2 weeks and eventually started feeling a little better. I occasionally take clonazepam now but am almost out and don't have a psychiatrist (hard to find any that take medicaid and they have all been terrible compared to who I used to see when I had money to pay out of pocket).
The entire time I was feeling worse and worse I was on SSRI's. I quit them and didn't feel any worse but was really bad off for a few years. Once I started seeing a counselor and trying to get out more I have very slowly started to feel better. I'm still very far from feeling normal at all though but I'm not in complete hell anymore. When I say I feel "better" or "good" its really just comparing to when I was at my worst. Compared to most people I would say I'm still very unwell. Progress is progress though and as long as I keep feeling better maybe someday I will feel well.