You need to back up a few steps and quantify what you just said.
Culture manifests itself (especially) when things are going poorly or are really tight in a game. One single recurrence might be an aberration, but patterns develop over time to show either (A) a pattern of figuring out a way to win by making plays, avoiding mistakes, capitalizing on opportunities, being well prepared, bouncing back from in-game setbacks, etc. . . . or (B) coming up short by not doing those things listed above.
In previous years, coaches like Pruitt established a culture where we might have brief flashes (illusions) of progress but the true pattern was always (B). A strong culture is a belief system and shared mindset that enables individual and collective accountability, work ethic, discipline (on and off the field), and commitment to the common goal.
Coach Heupel is fighting to establish such a culture. It takes time because it must permeate down to the unspoken, taken-for-granted assumptions and beliefs of individuals. Once those are ingrained, they manifest collectively on the field. This is what Saban has established at Alabama more so than any advantage in “Xs and Os” coaching (although he does that well too).
Unfortunately, failure begets failure, and the toxic legacy of Pruitt, the fakery of Butch Jones, and the ineptness of Derek Dooley have left a mess to clean-up. Heupel and co. have to build up an organization that has been defined by incompetence, losing, toxicity, and unethical conduct (these last two under Pruitt). The foundation for Heupel is not strong, to say te least. He is building almost from scratch.
The Pitt loss can be explained away as an early game, but it was a clearly winnable contest that we squandered because we could not take advantage of opportunities (how many overthrown passes?) and could not make the plays at the crucial times. The Florida loss was, in my view, almost entirely the result of a lack of belief, a mental block - which is, in itself, a function of bad culture. Ole Miss was one that slipped away, at least in part, because of that lingering doubt in our ability to make the plays it takes to win when the pressure is on (and, yes, we were hampered by poor officiating).
The Purdue game is the second most egregious example of our culture producing a loss this season (UF was the worst). Just because Altontae was out, our entire defense suddenly forgot how to tackle? Why are we throwing deep when all we need is about 10 yards to make a very doable FG for the win? How many penalties did we commit to out ourselves in bad spots? Lots of other problems besides finding ourselves in a spot where really bad officiating could sway the outcome - and, yes, that missed PI near the end of regulation and the terrible “forward process” call were back-breakers.
Coach Heupel is contending with all of this. Positive culture change takes time, so it’s not surprising that we are still struggling at times. Heupel did more to fix the culture than I thought possible in one year, but there is still a ton of work to do, as evidenced by what I described above. He’s going to have to grow as a coach too - Personally, I’m glad he’ll do that growing here. But the UK and South Carolina games won’t be easier next season. The rest of the league isn’t sitting still.
The old saying in my line of work is that “culture eats strategy for breakfast.” It is equally true for our football program. Until that gets fixed, and there are some good signs that we are making progress, not much else will matter. Winning cultures find ways to overcome bad officiating. Winning cultures come back after setbacks. Losing cultures find ways to lose. Coach Heupel has more work to do in order to establish the culture he (and all of us) want with UT football.