The V-22 is not a helicopter, all vertical lift aircraft are by necessity thin skinned and as light as possible, a 23mm gun is by no means a pea shooter.
There may be screw ups in the recent CV-22 mission abort, but I haven't seen anything that indicates it was an inherent fault of the V-22 design.
I would really prefer the DoD invest in Sikorsky's X-2 technology, but come on if you fly over a ZU-23 and get hit, even an A-10 would likely have problems afterwards.