I think that it is bad genes involved as I have had a few "freaks" over the past 6 years and they show up year after year looking that way too.
I think that injuries tend to last about one year most of the time as the re-growing process tends to get back to a more normal routine after about one year after initial injury involved. I base that thought on information that I have seen during the past 6 1/2 years or so. I know that it was very disheartening to watch a really nice mature buck with a really nice spread set of antlers during one season and watch it return the following season with really messed-up deformed antlers on one side the next season.
He appears to be young 2 yr old id say and could be a freak in the making, he appears healthy and its still early in the growing season so maybe he is one to keep an eye on, but he doesn't have what i would call a huge rack for a young deer so maybe he does have bad genes. Interesting rack to say the least but i wouldn't call him a cull or bad genes until you have consecutive yrs of him with antlers this way.
Not sure and no expert here, but I think it is likely from pedicle injury (too much bone on shed antlers, i.e. "dirty sheds"). I also think genetics can play a big part in a deer's predisposition to have dirty sheds.
Do you find alot of sheds with pieces of skull cap still attached?