You can do all kinds of things with numbers.
https://en.as.com/nfl/what-was-bill-belichicks-record-with-new-england-patriots-without-tom-brady-n/
“However, his success deteriorated significantly once Brady left the Patriots for the Tampa Bay Buccaneers. In the four seasons that followed Brady’s departure, Belichick’s Patriots made the playoffs only once. With Brady as his starting quarterback, Belichick’s record with the Patriots was 219-64 (.774). Without him during that same span, his record with the Patriots was 47-57 (.452). After Brady left for the Bucs, Belichick’s Patriots went 29-38 (.433) with just the one postseason appearance and no AFC East titles in four years.”