Is it one or two issues?
I have noticed other posts about not being able to get into matches. My problem specifically occurred right after an opponent was found, the screen would go blank or black, then a bug report would pop looking something like this:
[0208/143631.925:ERROR:gpu_init.cc(426)] Passthrough is not supported, GL is swiftshader
[0208/143830.382:ERROR:gpu_init.cc(426)] Passthrough is not supported, GL is disabled
[0208/143914.624:ERROR:ChromiumLogFunctions.h(15)] 563479 [ChromiumToPluginBridge] ReadFile failed with error code: 109
[0208/144030.880:ERROR:ChromiumLogFunctions.h(15)] 639731 Didn't receive a heartbeat message from the main process, so it must have died. Terminating the Vuplex WebView Chromium process...
[0208/144031.037:ERROR:ChromiumLogFunctions.h(15)] 639888 [ChromiumToPluginBridge] WriteFile failed with error code: 232
[0208/145627.709:ERROR:gpu_init.cc(426)] Passthrough is not supported, GL is swiftshader
[0208/145820.501:ERROR:gpu_init.cc(426)] Passthrough is not supported, GL is disabled
[0208/163432.055:ERROR:gpu_init.cc(426)] Passthrough is not supported, GL is swiftshader
[0208/163629.243:ERROR:gpu_init.cc(426)] Passthrough is not supported, GL is disabled
[0208/163702.702:ERROR:ChromiumLogFunctions.h(15)] 336557 [ChromiumToPluginBridge] ReadFile failed with error code: 109
[0208/163749.642:ERROR:ChromiumLogFunctions.h(15)] 383505 Didn't receive a heartbeat message from the main process, so it must have died. Terminating the Vuplex WebView Chromium process...
[0208/163752.048:ERROR:ChromiumLogFunctions.h(15)] 385905 [ChromiumToPluginBridge] WriteFile failed with error code: 232
[0208/170927.652:ERROR:gpu_init.cc(426)] Passthrough is not supported, GL is swiftshader
[0208/171126.116:ERROR:gpu_init.cc(426)] Passthrough is not supported, GL is disabled
[0208/171550.706:WARNING:task_impl.cc(31)] No task runner for threadId 0
[0208/171749.657:ERROR:gpu_init.cc(426)] Passthrough is not supported, GL is swiftshader
[0208/171949.257:ERROR:gpu_init.cc(426)] Passthrough is not supported, GL is disabled
Kinda like that stuff there. So, I reinstalled my graphics card driver, and reinstalled the game then was able to get back into matches. I don't know if one or both of those things helped actually but I am sharing what I did.