I am having a similar issue. Within several minutes of starting the Brave browser, my entire system will be completely unresponsive, include the keyboard and mouse. I have to do a forced power-off by pressing the PC’s power button for 5 seconds.
I have to get some work done now. But, in the near future, I will try disabling hardware acceleration.
I have tried using various versions of Brave, but they all do the same thing.
I have tried deleting the whole profile, but the problem still happens.