I think you have the most current official version of the game unless you install the latest beta patch. (can't remember the last code without beta patch!).
You can elect to play the game offline, but it's still via steam in offline mode.
If you post your system specs, people may be able to advise re graphics etc.
Try adjusting sensitivity of control axes in controls menu, or adjusting dead zones if you're more comfortable with these.
Good luck!
