I scanned through it, and one thing that jumped out is the Google Trends graph for "Myocarditis". Is it really "curious" that more people are searching for that term, given all the media coverage? How many people even heard the term "myocarditis" before 2021?

This is beyond useless as any kind of supporting evidence for the point the author is trying to make. Mixed in with Twitter anecdotes and random YouTube videos, it's just noise making it that much harder to critically evaluate the argument.

The term "Gish gallop" comes to mind.