I'm sorry but those pictures simply do not tell the entire story. Hardy is 6' 4" tall and 280 pounds heavy, and Nicole Holder is almost a foot shorter and less than half his weight.
That type of bruising could occur during rough sex, or it could even be inflicted defensively by a man of such a size holding away an angered woman attacking and flailing her arms, legs, or whatever in a physical confrontation. That is not the type of bruising that manifests if such a man actually hit a woman with even half his strength.
The point is, after hearing the stories of the two parties involved and assessing the bruising in those pictures, the judge who specializes in domestic violence cases thought they were ambiguous enough to be unworthy of the charges.