M5 becoming 60 mph

It’d be alright if the car driving numpties actually sat at 60mph…but they’ll sit just below an indicated 60 so probably around 54-56mph…just the right speed to get in lorries way. They’re that dense they can’t work out that they’re crawling when a vehicle limited to 56 is passing them. I wouldn’t even mind if they sat in lane 1 but they always sit side by side not gaining on each other in lane 1 and 2, getting right in everyones way