Over 15 free VPN apps on Google Play were found using a malicious software development kit that turned Android devices into unwitting residential proxies, likely used for cybercrime and shopping bots.
Initially maybe, but they use a Algorithm to detect VPNs and other holes in their filter and they will block you eventually, or they just scan your traffic regardless of a VPN (yes that's possible, although very Costly)
Have you ever been to China? I have been lived in China for many years, actually no much complains of my very own experience so far.
And I'd been to US, Indonesia, Thailand...and the worst experience I had is in US, each time I visited there, there were gunshot incidents happened nearby, and homeless people, bad smell on subway...I am not saying all US places are like this, I only visited CA, some places are cool, but I definitely won't go out alone after 8pm in the dark.
What makes them a "troll"? Their comment was exactly the same as yours - subjective opinion based on their claimed experiences living there. Neither of you provided any factual evidence. You sound like someone who wants to live in a bubble where anyone who disagrees with their world view is a "troll" and instantly blocked. Ironically, quite a similar outlook to the Chinese government you so despise.