I'm in the minority that really liked it. "Boring" never occurred to me as I was watching it. He just strikes me as a humble guy grinding out the miles, under the radar, not seeking attention, just trying to see where it takes him. If I was in my 20s, I'd find it an appealing lifestyle (but then I'm a pretty boring guy). Props to him for getting the most out of his ability and preventing "what ifs" down the road.
For the others who found it boring, don't fault Vail, fault the filmmaker.