A truck driver “cutting you off” in traffic? Asshole, in absolutely no different way than the far higher number of non-truck drivers that have cut me off in my life.
A truck driver driving at the highest speed he can and stuck next to another truck on a hill and you REALLY want to be able to go around him, because your time is of course far more valuable than anybody on the road that is not you? Not an asshole. Any more than the poor RV that gets stuck in the same situation trying to cross over a mountain pass.
Yeah, I really feel most people on the road think that whatever the fuck they have going on right now is of the UTMOST urgency, and all other drivers on the road exist only to be in their way and slow them down. An attitude I stamped out with extreme prejudice while teaching my kids to drive.
ETA: I feel I should point out, no truck driver WANTS to have a vehicle on their right side for an extended period of time. It’s uncomfortable to drive that way. And when you get “stuck” with somebody on your right side, and vehicles starting to get lined up behind you, you can’t just “drop back” because you don’t know how many vehicles are stuck in your blind spots. So the best you can do is just keep pushing as well as you can.