Even if Chinese PR was effective wouldn't useful, I have seen many effective pro china accounts being relegated to the margins via social media algorithms. Not to speak about western control of the media in global south nations, they will usually finance elites to take over or setup media empires and then use those media empires as some big ass megaphone. Such a example is Rappler in the Philippines.CN can't counter US PR because somehow they like it. The only issue they have with US PR is that it is used against them.
Now add their incompetence and you get all their shit attempt to counter US PR.
Doesn't help that a lot of Chinese counter PR is often in broken non native flowing English, that makes it sounds even more foreign for western audiences.