This absurd "they lied to us" nonsense has been beyond ridiculous for a long time now. It says nothing but how much the speaker has zero clue about the scientific method and about science itself.
So to spell it out for Covid, it has ALWAYS been said from the very beginning that this was a NEW VIRUS. That means they, the scientists, had much less to go on from the start, and, as such, their understanding would likely significantly change as more was learned. As more research was done and data collected the virus's virulence (and mutations) became better understood as did the efficacy of various vaccines, so that NECESSARILY public health recommendations also changed. THAT'S HOW SCIENCE WORKS. And that has been the experience with Covid research. So continuing with your imbecilic "they lied to us" does nothing but communicate what an idiot you are.