Carr got his ass beat due to lack of support.What happened to Carr in Houston was a crime. 76 sacks in a season...11 fumble recoveries (his own fumbles).
I'm not saying he would have been a world beater...but he certainly didn't have a chance to show what he could do. Those 1st 2 years, had to focus on survival.
In terms of “potential” I can’t recall a QB that had more, but didn’t have a supporting cast.