A post elsewhere hear said it already, but it’s my experience too: cyclist break laws constantly, due to apparent feeling of entitlement to keep moving fast, regardless of the traffic, lights etc. the thought of just stopping safely for a few seconds didn’t even cross your mind in the situation.

Note that I am not sympathetic to the driver of the car. They probably deserve criticism, but not blame for your slide. I know that you want to blame somebody that is not yourself. That's human. But when any pedestrian, bike, car, airplane, drone, skateboard, etc. runs into a stationary pedestrian, bike, car, airplane, drone, skateboard, house, fence, animal, etc. it is almost certainly the fault of the moving object's operator.

In your case, you failed to change lanes safely. It sounds like you really blame the lane design for having a bevel between lanes. It's interesting to me that the bevel probably has almost zero effect on cars/trucks but a significant effect on bikes. That seems like a bike-hostile design. The fact that it is only two feet wide seems questionable to me. A slow-moving bike would also encourage you to change lanes, navigating the bevel twice.

I agree with the bike hostile design part. Navigating the bevel downwards is not a problem. Navigating it upwards at a steep angle of attack is.