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> although moderation was quite angry that I didn't choose an accepted answer within a day.

I don't know about Stack Overflow, which is the largest SE site, and may have some cultural differences.

But I'm pretty sure that accepting an answer within a day is strongly discouraged on all Stack Exchange sites in general. You should wait, at least one day before accepting it - some users may still want to answer it. I only accept answers when nobody posts new answers. Also, a user doesn't have to accept an answer, if none of the answer is helpful for solving the question - it has been discussed on Meta before.

Personally, if I asked a question and none of the answer solves the question, I'll accept the most helpful one. If none is helpful, I don't accept any answer, and usually I will be able to answer my own question and accept myself in the future.