One of the big mistakes a lot of teams make is when the season is essentially over, they have nothing to play for, they overrate performances and think it carries over to the next season.
For example Your QB sucked all year, is the biggest reason you’re not gonna play in January, then in December he has a couple of nice performances against horrible defenses and you think “OMG he’s turning it around let’s give him one more shot”. Nope
Look at last years falcons, started out 1-7 and finished strong down the stretch including winning their last game. Did they carry that momentum into the next season? Of course not, they ended up firing the GM/HC in the middle of the year anyway.