More traditional vaccines are also available. Thumbs down on those too?
The mRNA vaccine literally just has mRNA and nothing else that could be of any concern.
mRNA is very unstable and will not last in your body. But it will help the cells it gets into temporarily express viral proteins which will teach your immune system about them in case you see them again in the future.
The virus will do the same thing, except with a whole lot more mRNA (its full genome), and in many more delicate tissues than your deltoid... like your lungs and nervous system.
So long term complications are much more likely from having the whole genome of the virus injected into various cells in your body (during an infection) than by just a few bits of its genome injected into your deltoid (by the Pfizer or Moderna vaccines).
So you can't logically spread the fear you're trying to spread. Nobody that's been vaccinated (more than a few weeks ago at most) has any of the vaccine's mRNA left in them. Just trained immune cells.
If you said, "the whole thing is for not, the virus and all its future strains are here to stay"... then you might have an argument, except you're still asking for more risk to public health and to the economies of the world.