That’s normal...not sure why you are surprised.
I've had probably a couple dozen vaccinations in my life, along with a few dozen other shots. None have made me "feel like hell". Why is it, that for this one, "that's normal"? If you know of a logical explanation, it would be helpful to understand why.
However, those who are freshly once or twice vaccinated are reported as "unvaccinated" or "partially vaccinated" until 14 days after the second jab. In most reporting on those people the documentation simply refers to them as "unvaccinated". From what data can you claim that "that's normal", when the public data on the people who are suffering shot side effects are called "unvaccinated"?
Is your statement, "not sure why you are surprised" a tactic to make someone feel like they should keep their silly thoughts to themselves?