Is this fixable

I've done some frames and stretches in my day, and from the looks of that one it would be better left to the scrap pile.......

If it belongs to you and not the insurance company, part the thing out....strip it down and cash in on the good stuff......But personally, I would never take on such a mess as this one for a rebuild.....very difficult to ever get it "right" again, and it would cost far more than a comparable used car in good condition by the time you were finished.