Error code: BFAE8BDA-FBB7-4E90-A816-5AD353456E99
Hey there,
Looking over the crash log I’m not seeing a specific root cause for this, but I do have some ideas for you to try.
I’d start by updating your motherboard’s BIOS to the latest version. This is going to be pretty important since you have a Ryzen system and BIOS updates have fixed some major bugs/issues that can cause Overwatch to crash.
Your current BIOS version: 5.50
http://www.asrock.com/mb/AMD/AB350M%20Pro4/#BIOS
If you’re not comfortable updating the BIOS on your own I’d recommend contacting the ASRock or taking the system to a professional.
Make sure to update the AMD chipset drivers as well.
Lastly, you may also just want to check your RAM speed/timings to make sure you have them set correctly based on what the RAM is rated for.
If this is beyond what you are able to troubleshoot on your own, apologies, I just wanted to provide what I could with the limited info available. 
More basic steps would be here: Overwatch Lockups and Crash troubleshooting