It has been happening to me as well for a couple of weeks. It can be fine for days but today it crashed 7 times in a row and it’s just unbearable to play like this. I sent a ticket last week and got no response.
I have an NVIDIA GeForce GTX 660 Ti, the driver version is 337.88 (the last one was crashing for me as well, thought this would finally fix the issue)