First, the door handle is NLA (no longer available) from the factory, at any price, so hopefully you can fix your door handle.
Second, we had an issue with a previous coach we had, the door was bent outward at the top because the PO had left their spare key inside, and the door was locked, and they had lost the original key. If it looks like it is not an adjustment, and it probably isn't, that may have been what happened to yours. If that is the case, you may have to gently push the top of the door back in, using a small block of wood to block the bottom of the door out. Go easy on it, if you crack the doorframe, you will need a new door, and they aren't cheap, either.
Meddle not in the affairs of dragons, for you are crunchy, and taste good with ketchup.