I have posted a couple of questions on this website. Based on this small dataset, there seem to be a trend that hard-to-answer questions get downvoted, and even closed for some random reason (too broad, opinion-based, etc.). Even though from time to time there actually exists a good answer, which is hard to share when the question is closed or roomba-removed. Voters are free to do whatever, except serial serial voting, but I'd encourage genuine voters to think twice about whether they are downvoting/closing a question because it seems difficult or impossible to answer.
I am not sure if this answers your question in general, but it is related to the questions you tend to ask on the main site.
While I do not tend to down vote your questions,when reading your questions I often struggle with how they fit with our don't ask "policy":
You should only ask practical, answerable questions based on actual problems that you face.
While your questions tend to be practical and answerable, I don't always see how they could be about actual problems you face.
As a side note, I am not sure "actual problems" should be a requirement.
The voting rules aren't very strict (as opposed to closing for example) but I don't think the fact that a question is hard to answer is a reason to down-vote. A question should "show research effort be useful and clear" to warrant an up-vote but it's also a matter of personal interests.
I don't think that the issue with the questions you mention is that they are "hard" but rather that they look very much like advertisement for your opinions and pet peeves* that you tried too hard to make look like questions.
My guess is that some users doubt that you genuinely think there are possible answers that would fit this site's format but rather hope for extended discussions in comments supporting your opinion.
Sometimes the click-bait works and you gather many votes, sometimes it's too obnoxious and the opinionated undertone triggers down-votes.
*Ok, so you dislike that some people pay to read articles. We get it.
Ps. Many of your other questions are fine in my opinion.