These types of jobs are long term in nature. Just using Atkins as an example... he took over starting in 2016, but when did the team really start to resemble what he built vs what he was left with?
I'd arguably say the latter part of 2019 was the first time you could really see his fingerprints on the actual team. 2016 was all basically leftovers, and 2017 and 2018 were just ... do the best you can to be not terrible with shorter term FAs while trying to restock the system through the draft and trades.
2020-2023 has objectively been successful in the regular season and has made the playoffs 3 times. Rogers is making boatloads of money off the Jays. In any sort of company review process, Atkins and Shapiro have been a smashing success from a corporate point of view.
Fans point of view, basically if you don't win a world series, you should be fired every year.