Politics is the question of how political heterogenity is resolved. The political system is the range of acceptable methods used in that resolution and how power is distrbuted amongst those competing groups. In that restrospect, Democracy and Authoritarianism exist on the same axis. The former resolves things peacefully through voting, the latter has a single interest overriding all others violently.
Hence if you say "population at large having control", it's largely a meaningless statement because if a population is in agreement there is no need for politics and thus no need for a political system. In reality, politics always exist, groups are not homogenous, especially not a group on the size of billions. 99% of people don't really care about what OP says, in so much that they would forsake that for more pettier thing. We will all disagree over the tiniest of issues, and thus from there heterogenity springs and a political system is formed.
Hence, the issue of "delivering results" is largely tangenital and irrelevant because that occurs after Politics. It's a given after all that a interest group would achieve it's goals without the political restraining it. So no, China isn't "more democratic" because the CCP is effective in achieving it's goals when it already has total political control. That's axiomatic.
But there is explicit rejection of plurality, and thus the expression of political heterogenity, there is only one center of power allowed, and political decision-making is resolved violently. So it is Authoritarian, full stop. It is not "Democratic", in the same way it is a oxymoron to state a "Democratic Absolute Monarchy" or a "Democratic Military Dictatorship" even when the latter two can produce results. If you want to call it something, just call Authoritarian Populism.
