This is called the Napkin Fallacy. When you write down some solution to a long standing social problem on a napkin in a coffee shop, and then instead of asking

"What is wrong with my solution, that it hasn't been adopted?"

you ask

"What is wrong with the world, that it hasn't adopted my solution?"

The world needs a lot more people asking the first question rather than the second. Virtually no one should be asking the second question. As the saying goes "For every problem, there is a solution that is clear, simple, and wrong." That's usually the napkin solution. When you stop to really think about what is wrong with the napkin solution, you start down the path of solving real problems. It is highly unlikely that long standing social problems have napkin solutions.

As a slightly toxic corollary to the Napkin Fallacy is the Virtue Fallacy, which tries to answer the second question with

"It is because the world is run by bad people"

This is bad not only because it is an easy way to avoid the difficult work of understanding why the napkin solution doesn't work, but also because it caricatures one's opponents, and it is close to self-deification. While the saying "Let God be true, but every man a liar" is sound, the saying "Let me be true but every man a liar" is unsound. There is generally nothing about any of us that makes us better than others. Do not assume the world is run by people worse than you.