The historical record strongly indicates that people didn't care that much about the 1918 pandemic after it was over. It's not like history was poorly recorded in the 20th century; if people were fighting wars or implementing policies because the public was still angry about the pandemic, that would have been reported in the daily news.

You seem to have your dates mixed up... The 1918 pandemic is largely accepted as being exacerbated by the end of WW1.

There's a theory that it caused WW2: https://www.newyorker.com/news/daily-comment/woodrow-wilsons...

WW1 ended in 1918. You could theorize that maybe the pandemic made peace.