Not surprising that the perception of China has dropped in the last couple years.
From about 1992-2010, the dominant Western news stories praised China for progressively liberalizing their society and for liberalizing their economy. Even if they weren't committed to either, that was the narrative... That liberalizing their economy and markets has brought more people out of poverty, more quickly, than any other time in human history.
China was never truly committed to a liberal society or liberal economy, but Western media caught up to that started in 2010 when the surveillance society became ever more apparent. In the last tow years, media coverage of China from the West has accurately dug up and covered these stories:
- Spyware/backdoors shipping in Chinese-made devices
- The total cover-up of the Tienamen Square protests and massacre for the 30-year anniversary
- China exporting it's surveillance state technology / bureaucracy to dictatorships and autocracies
- Most importantly, that the Chinese Communist Party has been running a vast genocide and ethnic cleansing campaign on millions of Chinese. This was a story that China vehemently denied for years, but it's been brought to light only in the last 1-2 years.
Ethnic cleansing, genocide, political and cultural mass murder, were things that were hallmarks of the old Chinese Community Party. It's things that only happened during the Cultural Revolution, Great Leap Forward, or in the years that China was closed off from the West. To see a large scale, coordinated, mass murder, genocide, and ethnic cleansing campaign in 2018 and 2019 is something that the West hadn't really thought was possible. And, importantly, it's only come to light globally because of Western journalism and reporting.
The spyware/backdoors/surveillance stuff might not pique your interest if you're a human or civil rights advocate... Maybe you equivocate and say "eh, did you ignore the Snowden revelations...?! Have you ever seen the cameras in London?? Why should this matter??" (even though to any informed honest person the scale of the Chinese surveillance state dwarfs that of every country in the world), but once the revelations about the Chinese genocide and ethnic cleansing campaign started to become common knowledge, it's tough to ignore and you can't equivocate.