Its a combination of many factors. Here is a partial listing.
Arrogance, but lots of programs are arrogant.
Fractured mega-booster base (Houston vs Dallas for example)
Serious academic institution that has real standards to uphold (not a bad thing but part of it)
Huge mid-level booster base capable of serious interference
Lack of cohesion between AD and booster base at any level
5 leads to poorly run searches for major mens coaches because there is no comprehensively orchestrated and executed strategy
In general, a badly run (especially historically) athletic department as it relates to major mens sports (contributes to 5)
Country club atmosphere
Only a few brief periods of success interrupted by LONG periods of mediocrity gets ingrained at some point
Texas believes that everyone wants to coach at Texas. Some coaches dont give a fuck about Texas.
Texas believes that Texas should be elite just because its Texas, there is no thought of excruciating level of effort required to achieve maintained success at the highest levels
11 means that fans believe you hire a good coach, you recruit the same 4-5* like always, put them in the country club, and success naturally follows. It doesnt.