It was a small overlap crash from her side.
Older car are usually extremely bad with this kind of crash.
Anyway, I think OP was going a little bit fast, but I think this tractor is at fault.
Remember the crazy girl from Quebec who parked her car on the left lane on the highway to save ducks. She was found guilty even if it was proved that the guy who hit her was driving too fast. The situation look the same to me.