1) Did it ever occur to you that people start to die at a higher rate over the age of 80?
2) Here is the study in question. https://pubmed.ncbi.nlm.nih.gov/32120383/
Here is a quote from the link you provided.
“The more of the elderly population that got flu shots, the more the death rate increased."
The linked study does not support this conclusion. The quote is from Twitter, which I have provided a screenshot of.