Atlas Shrugged

I'm 100 pages in to Atlas Shrugged and I absolutely hate it. I've hated it from the very beginning, but I've pushed through until now... I find all of the characters and conversations extremely hard to believe. The writing is poor, the story is slow to develop, and it feels long for the sake of being long. Is there some groundbreaking revelation coming which makes this book worth trudging through, or should I cut my losses and give up?