It's like you have absolutely zero going on in your brain. Were you not paying attention to the story at all? The bombs were dropped because oligarchical democracy and over expansive capitalism failed, and you want to rebuild the very society and way of life that led to the world's destruction? All throughout the game are you shown NCR's bureaucratic weakness and structural flaws, the game is practically mocking you for picking them.

At least the legion is actually trying something different, i wouldn't side with them but at least they're thinking long term and learning from the past. But you actually tried to replicate the past? Are you dense? If capitalism is your thing then why not side with House? He's literally proven he can create a stable society through sheer force of economy and enforced order. Even independent vegas is better, at least then you have the space to cultivate a society and culture that doesn't LITERALLY repeat mistakes old world America did; bureaucracy, unstable power structure and over expanse. What the fuck is wrong with you?