If a batch of bad onions killed and injured as many people, the onions would be recalled and whomever sold them sued into oblivion. It's well past time these useless at best, and sometimes deadly, jabs were recalled.
There may not be a causal link established - yet. But the data indicates something is very different between 2021 and the previous two years. Now, what is one common difference across the population in that timeframe? Sure, we can go look at the possible correlation and causation by too-tight shoe laces, but it would probably make more sense to look into the experimental vaccines that have been “sold” and/or coerced onto the population.