While I see where you're coming from with this idea, implementing it would likely introduce a botting problem. Win count would become the new experience point and Diamond rank the new level cap.

Unfortunately, this situation and stress in general is present in virtually all competitive video game scenes. Nobody likes being ranked below someone else, dealing with the fear of loss, or the stress of how challenging a win can sometimes be, but that is what competition is. It doesn't have to be stressful or difficult, but you don't have to be diamond either. The rewards are for people that decide to go through that in order to get them. Everything isn't always easy or chill, and sometimes that's fine.