First you said they were "Lousy", now they are average even though they ranked 12 in scoring defense, and they are 32 teams. At least we're getting somewhere. Now what about his performance against Belichick's top 8 defense? The coach who destroys rookie quarterbacks, including Justin Herbert? Or how about his performance against KC?
To suggest Tua didn't have any positive performances in his rookie season, or showed some high level processing means you don't know what you're watching. Especially considering the totality of the situation with him coming off an injury in a covid season, and having an injury depleted receiver room down the stretch. But if you're dug down deep in your position, because he doesn't fit the physical profile of a QB prospect that you desire, that's fine. You're entitled to your opinion. Even when it ends up dead wrong.