Yeah, if AMP is antitrust then so is Facebook's Open Graph.
Despite the hate for both on HN, neither format is targeting competitors or hurting consumers in this case.
I think the antitrust argument against AMP is a bit more subtle. The argument seems to be that Google is abusing it's market dominance to push sites into using AMP. This in turn prevents them from using third party trackers, while the pages will be served via Google caches when accessed from Google search. Hence Google gets to track the visitor, while third party tracking from other providers is prevented. I.e. Google is abusing it's power to thwart competition in the analytics and ad-tech business.
Of course as a consumer, I don't really care whether it's some random company or Google who gets to violate my privacy, and I especially couldn't care less about lack of innovation in the privacy violation business, so I think the antitrust angle here is pretty slim.
You can use Google Analytics through the <amp-analytics> element [1], but since AMP prevents third-party scripts that were not approved by Google, I'm not sure how you would include other trackers in an AMP site.