The Bucs were a good team to join coming off some great drafts and solid free agent signings.
There are a bunch of teams that are “stacked” and an elite QB could go there and make them into real contenders. Brady almost went to SF, coming off a 13-3 Super Bowl appearance, or NO, coming off multiple late round playoff runs. There were rumors he was going to TN, LA, etc. With all of those teams, you could argue they had a lot of talent. The fact is, half the rosters in the league are talented enough to go deep into the playoffs with an elite QB.
But a Super Team? I don’t think that concept even exists in the NFL. The Bucs were 7-5 at one point last year and basically written off. The narrative really changed because of the Super Bowl mismatch, which was also about the Chiefs perception..
Conclusion: Bucs had a really good roster and added to it after getting Brady with Wirfs, Fournette, AB, and Gronk. That doesn’t mean at all that any decent, or even good QB, could have just gone in there and won a Super Bowl or even won 10+ games.
Also, I think Arians is a good coach despite having some negatives. He isn’t Belichick, but the players like him and play hard. He’s definitely not an idiot...even he looks like one.