There are two parts to that nope, one right, one wrong, and it's hard to tell what you mean.

(1) Covid (always) feels worse than anyone can imagine.

Nope. This was the whole problem early on! Not just mild cases--asymptomatic cases, even. A lot of them. Covid can feel like almost nothing.

Scary thing is, though, until you've had it, you don't know which way it'll be for you.

(2) If you weren't vaccinated it would have been worse.

Yep. Every metric of well-being is better on average for the vaccinated than the not, from death to symptoms.

A "nope" to this is just wrong.