I thought you were done?
Sam Darnold isn't a horrible comparison in terms of physical skills but you have to hope he learns to process like Darnold has, far from guaranteed, and you need to build him a really top shelf supporting cast for him to be successful. Darnold is viewed as a bust! Even this year he hasn't been especially good he's just on a really good team with an elite defense. 25 TD vs 14 INT's.
I use Burrow and Ward since they are two recent 1st overall picks. My point isn't that Mendoza sucks or even that he can't develop into a solid, 20-15th best maybe, NFL starter. It's that guys with similar skill sets who need lots of development and a really good supporting cast (low ceiling players) aren't that rare, even in this God awful QB class there are 5-6 guys like that, and they aren't worth taking with a 1st round pick.