I think anyone who has driven in serious traffic for years can relate to what you wrote above. People are always amazed when I tell them I drive 3.5 hours a day through brutal traffic, and wonder how I can do it. It's exactly as you said, you do whatever you can in your little private space of the car and eventually you get used to it. It's either that, or you go crazy like the people in the OP. Gotta do what needs done to avoid reaching that level, whatever that is, differs from person to person.
My personality cannot handle traffic. So, ever since I figured that out, I’ve had no commute or a very limited one. Live close to where I work...Only drive in traffic when it is my choice.