https://techcrunch.com/2017/08/29/overwatch-finally-adds-deathmatch-and-it-kind-of-sucks/

I haven’t played another FPS besides Overwatch in months, which makes me qualified to state that Overwatch is the best FPS on the market. That said, until today, it was lacking a deathmatch mode. And players wanted deathmatch. Though after playing a few rounds, it’s clear why adding this mode was not a priority.

Before this update, the only way to play the game was through objective-based modes. Players capture a point or a flag or something. But you were always capturing, which lacked a certain, “I just want to kill something” quality.