Not sure what you are concerned about... The dent and bend in the keel or the scratches.
I think that any tendency to turn to one side due to the bend in the keel will be unnoticeable but if I am wrong on that score I am pretty certain that you will be able to overcome it with a small amount of opposite rudder.
As to the scratches - don't worry about them : unless you keep it inside wrapped in cotton wool (which may not actually be what you bought it for
) it is gonna pick up some scratches. If they offend your eye too much you can clean the muck out of them with a water blaster & then they'll hardly be visible.
Tell you what else, though : you have a great boat there (I am lovin' my new Oasis) and if you negotiated a good price as I suspect you did you've done well I reckon!