I am not going to try and defend bad drivers, and the Prius is a bit of a special category because there are so many of them. That being said, I recently bought a Nissan Leaf. It is all electric so not a hybrid, but it is a slightly higher powered golf cart. So when attempting to reach cruising speed on the freeway it is going to take us a while. I usually realize this and try my best to get out of the way of drivers like the OP as not to upset them, but the reality is sometimes it cannot be avoided.
I get to use the carpool lane but I have yet to use it much because I don't want to hold up traffic. Traveling in the Leaf over 70 is a MAJOR battery killer. 60 is really the max that you should go, that is too slow for the carpool lane so I rarely travel in it.
So on behalf of us slow alternative car drivers, I apologize for our slow driving.
P.S. Some of the things you mentioned, like no crossing traffic like a lunatic I cannot apologize for. Mostly I am apologizing for the slow acceleration and slow driving on the freeway.
Hope this makes you feel better.