Ok, I understand what you're trying to say. But, let's look at some history.
2011 - East at home against a 9-2 Independence team. East takes 28-3 lead in first quarter. That's it for East. Independence shuts them down the rest of the way, to rally and win 29-28.
2012 - East playing Butler at Memorial stadium in Charlotte. East goes for a touchdown on a fourth and goal. A run by Garrison Duncan at the goal line was stopped. Butler goes on to win.
2013 - West Forsyth scores in the last minute of the game, to knock East Forsyth out of the playoffs.
2014 - East plays ninth seeded Providence and takes a 21-3 lead. Providence rallies and knocks out East in the first round 24-21.
2015 - East hosts Mallard Creek. East plays with the Mavericks and has a good lead with about 6 minutes to go. Mallard Creek comes from behind, scores on a 34 yard pass. James Smith runs in for the two point conversion. In overtime, Mallard Creek scores the winning points and goes on to win their third straight title.
I understand what you're saying. The "humps" and "us against the world" can play subconsciously without one ever knowing it. Take a look at the evidence, by way of past history.
If it's never about the "humps" or the "us against the world stuff" but only execution, then it falls on the coaching staff, as well as the players. The coaching staff should be preparing the players both in ways of x's and O's, as well as mentally.
Why is East not executing in the playoffs when,when they do during the regular season? Or is it that they aren't playing the quality of teams during the regular season, that prepares them adequately for the playoffs?
If it's just about the execution, then you have to ask why is the coaching staff doing the job during the regular season but not the playoffs?
Is it possible that coach Willert and the coaching staff at East, are great regular season coaches,but not so great playoff coaches? It happens. No intent to be derogatory, but just asking a question.