That's an over simplification of things, there has to be an understanding that certain factors have to be met for a fight to be considered ranked, or we might as well ditch the entire system as it means literally nothing.

If all it takes is for the two competitors to agree at the start to fight, without any indication of how that fight is going to be regulated, then what does a fight being ranked even mean? The whole point is that it should be a competitive match, which can be judged as such. There is no competition in the world that exists with undefined rules from the outset. One can construct a reasonably sound argument that the reason this fight ended isn't down to anything less than the fact that one person was playing with a set of rules the other wanted to change, and when things got unnecessarily heated because there was no restriction or rulings being made, a person left. I'm not sure we should be condoning being a dick to win fights, it's the sign that our ranking system is shit and laughable. 

Maybe Divinity gave up too easy and should lose, I dunno, but if this is to be the norm for ranked fights from here on out I'm disabling my ranked score and ignoring ranked competition forever, because it's meaningless and a waste of time.