Wrote a whole book review on Nixon recently here: https://booklight.top/posts/2024-11-05-watergate

In the context of that specific post, Nixon was removed by deep state kinds of elements that featured future heavy hitters like Hillary Clinton. The reason he was removed was because, the research of the book presents, he had plans to cut the federal government down. That didn't sit well with the swamp, and everyone started trying to figure out ways to get rid of him.

As for the rest of his policies, I think the general feeling I have is that they were products of their time and any manner of "radical change" got you ham strung. The military industrial complex was all ready advancing its goals heavily by then.