Tua was hardly awful. Rookie QB coming off a major injury/surgery. He wasn't dynamic, but he was mostly pretty solid.
I'm not vouching for this site, but here's a Miami take on the draft. And they had more picks after the first round, which according to this article, they hit on.
https://www.305sports.net/grading-the-miami-dolphins-2020-rookie-class/
I think you're looking at this through Bills colored glasses, as many fans do.
Do you think Epenesa was a bust, Moss? Fromm?