When you are crashing to where the Blizzard Crash Handler app appears, this is often due to outdated drivers or a conflicting program. Please follow these steps first if you have not already.
If nothing helps, please go ahead and start a web ticket and share those crash errors in the ticket. Please also remember to add your system files so that Blizzard can learn about your computer quickly.
Obtaining System Files: Blizzard Support - Obtaining System Files
Starting a web ticket: Blizzard Support - Contact Support