Exactly! Point Lookout was decent, I disliked Mothership Zeta greatly. In all honesty, I thought Broken Steel was the only one worth it. I love the New Vegas add-ons. I'm currently working on Old World Blues, and then I'm gonna move on to Honest Hearts.
At first I was confused by what Ulysses meant, but I eventually figured out that it's understood that the Courier did these things. It was quite frustrating figuring out that I caused the death of so many.