Yeah, that sounds like my impression of Lonesome Road, and it's why I hate that DLC. It just - cheats. I'm not sure the confrontation with Ulysses isn't over-scripted as well, I know that when I tried to fight him he turned out to be the most ungodly bullet sponge I've ever encountered.
Compare and contrast Dead Money, which is far more lethal but at least plays honestly. By its own evil lights, at least.