Everett’s Rams teams early in his career were loaded on offense, including OL. He looked really good back then, but once the roster slipped he was not a QB that could elevate average players.
And once teams learned they could shake him up with physical play, the flood gates opened.
If the Saints do sign Carr he will need a beefed up OL and a safety-valve at RB and/or TE to have the best chance of him not getting the “shakes.”