Are you using Razer devices?
The Overwatch error logs can be tricky to read, and you may need to use the ticket system/employee assistance to figure those out.
However, your computer stores crash logs in three places. The first is the Windows Reliability History tool, which will show you errors happening around the time you open the client. The second is the Windows Event Viewer, which does the same thing with more detail in the system logs area of the app. And finally, a DxDiag report will show you any applications creating errors. If you’re stumped, add a DxDiag here and I’ll check it out for you.
Not the worst plan … 