You're mistaken. Rednote updated allowing for EN->Mandarin translation for chinese native users and made the settings menu appear in english for english speaking users. The rumors you've heard about rednote bifurcating (like Douyin and TikTok) are only rumors.
It amazes me that people will form whole opinions like this with no effort, no personal investigation. You can literally use a vpn to browse it if you're worried about your data, but I'm willing to bet that you have a marketing machine in your house that you welcomed with open arms. A majority of users on every social media have already had their data sold to every conceivable database, or are young enough that they don't realize how many datapoints they're making with their electronic footprint. Think about how likely it is that using a chinese app would actually affect you in any way - we've known for years now that health insurance and healthcare companies in the US that aren't covered by the narrow scope of HIPAA are selling our information, but you're worried about vine and instagram with storefronts included? Do you even know about marvel SNAP?
Actually, you can present the fallacy to anyone providing an undistributed middle syllogism, since they've "made an argument". In the post, an undistributed middle is identifiable - "your most hated almost dictatorship". This is almost certainly not the same even among tankies, so the user is putting forth an argument with poor logic from the get-go. You're not actually educated about logic except by youtube videos from people using greek or roman figures as avatars, are you?