Have you reviewed the stickies that cover issues like this? What steps have you tried? Known Technical Support Issues
This doesn’t mean apps you personally opened, it means apps that are scheduled to run in the background, use background services, or malware.
If you know you’re experiencing an issue with the game crashing, stop playing until you fix it. Joining games that you leave creates a bad experience for other players and it isn’t fair to them. More info here: Overwatch Technical Issues, SR Loss, and Leaver Penalties - #3