Perhaps. But if I weren’t online I wouldn’t know how widespread the support of Luigi is.

Only 75% of people on employer healthcare plans are satisfied? A great many people aren’t on employer plans.

From the third link you provided:

For the first time in Gallup’s two-decade trend, less than half of Americans are complimentary about the quality of U.S. healthcare, with 48% rating it “excellent” or “good.” The slight majority now rate healthcare quality as subpar, including 31% saying it is “only fair” and 21% -- a new high -- calling it “poor.”

> A smaller but significant share of adults, 12%, said they were supportive of the decision to murder Brian Thompson, 50, who was shot in New York on Dec. 4.

12% is basically zero in this country. To give you a frame of reference, 14% of people think Obama is antichrist

https://www.msn.com/en-us/news/us/1-in-4-americans-sympathiz...

https://www.yahoo.com/news/12-million-americans-believe-liza...

12% is not basically zero.

https://www.thewrap.com/luigi-mangione-discourse-alarms-home...

I think there's great dissatisfaction with healthcare in general, but social media is not a good way of judging social attitudes across the US. It's great for finding a small niche, however.