Google, which would gain the most benefit from AMP, deserves criticism for potential abuse of their power. Online media, which serve pages with poor performance, deserve criticism for its reluctance to improve their poor UX. AMP, however, hardly deserves criticism, through a perspective of user experience and news distribution.
AMP may look intimidating to the open web philosophy, be tepid approach from a technological point of view. But we need more experiment as it stands: everyone can become a media with the Web, old media is still playing a valuable role in society, online media lack prospects for the future to be profitable enough to invest in journalism. Fighting for the open web is good, but fighting for it without caring about anyone but technological principle is no good.