I didn't vote on either of these questions, nor had I seen them until I saw this question. However, I can give my feedback and suggest possible reasons why the what went wrong question was received more poorly. I'll ignore the more general question of whether what went wrong questions are poorly received on this site, since I lack data, and this question is tagged with the specific-question tag.
I'll refer to the questions by their timing to be more clear. The what went wrong question was the latter of the two.
The first question.
I don't have much to say about this one. It looks like a good question to me. The earlier question, asking for a solution, is brief, to the point, well formatted, and contains, what is for me, sufficient context (what you tried).
The second question.
The latter question has a couple apparent problems that likely resulted in its poor reception.
Firstly, it is poorly formatted and difficult to read. It fails to properly use centered equations to separate the equations from the text and make them more legible. It's also missing punctuation (most noticeably a couple of periods), both in its first version and the current version, which also makes it harder to read.
As for the content itself, the question is only in the title, not in the body of the question, where it's supposed to be. This is also problematic, since this is likely what led users to believe that this second question was a duplicate of your earlier question (for which it was closed as such, before being reopened). People being under the impression that your question was a duplicate would certainly explain a perceived poor reception.
Given the problems with your second question, I don't believe that there's evidence here that what went wrong questions are poorly received on this site.