Post operative expectations

Two months ago I underwent surgery to repair a locked meniscus. Following surgery, my doctor said that I had torn cartilagein my meniscus which was not reparable and also a partial tear in my ACL which he did nothing about. Currently, my knee is still swollen, I have been in physical therapy since a week after surgery, and I still cant walk proerly as my knee refuses to go to either full extension or retract properly. I am getting very frustrated at the apparent lack of progress going to therapy 3 times a week...wha should I expect in the way of recovery time to be able to walk normally again as opposed to the one crutch I am currently using ???