Just out of curiosity, do those 7.5+ million accepted answers include those closed as duplicates? Because by far my biggest complaint is finding the exact question I have was closed as a duplicate and links to a question that is useless at answering my question.
In that case you can vote to re-open and perhaps even post a bounty. Although bounties tend to invite lots of low-quality, low-effort answers just on the off chance that they might be the top-voted one once the bounty runs out.