Not much you can do about it. I've been barking up that tree for years. 100 mile ride on Autostrada took me roughly one hour (left lane all the way), in USA 100 mile ride on I-95 takes at least two.
I am pretty sure that 85% of US drivers don't even know that left lane is for faster moving traffic. Right lane passing is also annoying, I see the car flying in the back, I try to move right only to see him passing me on the right already, zero civility.