Two facts:
- He's not using the bicycling lane at all. He's driving on the road which is fine. But then you can't pass a car on the right. You're allowed to do this when you are using a bicyling lane.
- The car DOES SIGNAL and the brake lights were on long enough (He didnt hit the brakes super hard but rather slowed down normally)

To me a 100% cyclist fault. He had to brake as well and pass on the left.