If you believe Brady has shown a decline based on the talent around him, then I respectfully disagree. Compare 2013 to 2019, and let me know how those years are drastically different. If you didn't watch that season, then I encourage you to do so.
I expect Brady remains the best QB, even if he has lost some ability from his prime (that will happen with age). If you want that illusory great QB, then the team likely has to tank a season before an actual good QB shows up on the roster if and when the draft offers that possibility. Brady is a lottery ticket and nobody, including the Pats, knew what they had on draft day. I don't relish the idea of becoming the Broncos when Brady leaves, and that is likely until they endure some really bad years. Brady can still win if he has people to throw to, and I don't see a better alternative if I want to enjoy an actual competitive season.
Brady isn't stopping talent from joining the team He never has. The Pats have added talent. Just not at receiver and tight end.
JAG had an awful game with all the talent he needed around him and came up short. Kirk Cousins as well. Mahommes ain't coming to the Pats. Lamar Jackson couldn't win by throwing the ball, and won't have a long shelf life running as he does. So who is the knight in white armor if that guy isn't Brady?
Brady's time will end. I am just hoping it isn't today. Love what he's done (but that shouldn't keep a player who cannot play on the roster), but I still believe he is the best hope for one more round before the sad times hit. Having lived through a bunch of those years pre-2001, I don't yearn for a return of less than competitive football. A mediocre or bad QB virtually assures that.