Based on your use of the word 'fill,' the Gallup World Poll seems like a more appropriate ranking because it comes directly from the people. Even your dissatisfaction as a resident of the US is likely reflected in their analysis [1]. However, the situation in China is somewhat more complicated at present. Telephone and face-to-face interviews were permitted until 2023 [2], but the 2023 survey already relied only on web interviews, which correlates with reports of Gallup withdrawing from China [3]. This likely brings us back to the question of different faces of freedom - specifically, the ability to conduct surveys or polls without being accused of distorting the country’s image.
Both Freedom House and Gallup methodologies may be flawed, but without them or similar we would have to rely solely on anecdotal evidence, which is insufficient imho
[1] https://news.gallup.com/poll/660440/land-free-fewer-american...
[2] https://www.gallup.com/file/services/177797/World_Poll_Datas...
[3] https://archive.ph/v5F9a (US consultancy Gallup withdraws from China (FT))