The keys are Russell Wilson, Carroll, and John Schneider. Here is the Seahawks record before RW - and then after
2008 - 4-12
2009 - 5-11
Pete Carroll and John Schneider (GM) comes in
2010 - 7-9
2011 - 7-9
Russell Wilson is drafted in 3rd round and immediately becomes the starting QB
2012 - 11-5
2013 - 13-3 - superbowl champs
2014 - 12-4
2015 - 10-6
2016 - 10-5-1
2017 - 9-7
2018 - 10-6
2019 - 11-5
With Russell Wilson, Pete Carroll and John Schneider they will almost always be a playoff contending team