It's quite possible that detailed surveys exist that explain/ask what people in country X like and don't like about country Y.
Just because (some) people write bad answers, chock-full of propaganda and their personal opinions is not the fault of the questioners or questions. The fault lies with users here who upvote such answers.
As a suggestion, to discourage such answers, mods could add some banner to these types of questions to (further) discourage pure guesswork answers. I'm gonna say that all 'why' questions--regardless of topic-- are somewhat vulnerable to this.
A somewhat more intrusive/activist version of this for mods to delete answers to such Qs that (answers themselves) aren't based on polls. This policy is used on Skeptics.SX far more often, albeit even there not 100% consistently. Arguably, that would prevent any arguments-from-history [the most upvoted answer to the Poland Q is just that], so it might be too restrictive of a policy. (And despite its obviousness to some, the Poland Q has made HNQ.)
TBH, I don't see how these questions are any different than asking 'why' about the inclinations of any group [short of a gov't] on anything. E.g., Qs just from the same user:
And yeah, I've complained before to the OP (of these questions) that they describe a plurality by 'most'. I think my comments to that effect were later deleted by a mod, since I can't find them now. (Checking out this ELU question though, I might have been too pedantic, but it looks like most people use 'most' to mean a majority.) But that's somewhat unrelated to the main issue at hand here. Anyhow, if editing this user's questions in that respect is too much work, ban the user, not the questions. Others can surely ask such questions without misrepresenting the poll[s].
TBH, the issue of that user overselling something they read came in other Qs of theirs. E.g. Why do Russians vote when the elections are rigged?
Top comment (14 votes):
Perhaps it would be better to refer to it as a sham election, as the European Council on Foreign Relations did. "Rigged" implies election-day shenanigans, and I see multiple answers are using that technicality to talk as if they were perfectly up-front Democratic elections.
I also recall complaining about them overselling the notion of "conflict of interest" on another recent Q, that I think they deleted in the meantime. TLDR on this: it's about par for the quality of Qs from this user, in general. It's not an issue specific to these poll questions.