It's been known for several years that not all shots were the same. Sites started tracking the batches because some had far greater casualty rates than others.
https://howbadismybatch.com/
I have feeling you are right. Luckily most Americans, did not suffer adverse effects from mRNA so called vaccines. That includes 7 members of my immediate family.
But from news reports 2% jabbed did suffer adverse effects.
Only reason I took the jabs because I could not board cruise ships without full vaccination. We did a dozen cruises during that time because prices were discounted by half the normal price. Never got infected on ships.
Then there is needle aspiration. Whether the needle injects the poison in to muscle tissue or in to a blood vessel.
Dr. John Campbell: Needle Aspiration
Then there is the highly variable differences in human immune systems and how they react to a pathogen. A strong response to the spike protean may be more deadly than a weak response if a weak response is a fever and a strong response is your heart stops.