We have giant populations of people who refused the vaccines. We also have a giant resurgence of measles now because those people are so large in number and so influential. Long covid is far more prevalent in those populations than anywhere else despite the seemingly blanket belief that covid was inconsequential among them.
The trials for the Pfizer vaccine came back as 95% effective. Not sure what paper you're holding saying blanket immunity for all time but it was probably political not scientific. It then did an insane pivot with omicron. Way too many mutations at once for any vaccine to accommodate.
The science is very broad and very clear on all of these matters. I feel bad if politicians or news agencies lied to you but my advice is to take an aggregate of every country / health authority in the entire world and disregard your own anecdotes / the Joe Rogans of the world. There's just no way that a conspiracy can be as far reaching as what you're implying.