let's take a look at UCLA football. 
1 National Championship - 1954
19 Conference championships - last one in 1998.
from 1976-1995, under Terry Donahue, UCLA won 5 Conf titles.  finished top 20 AP/Coaches poll 12 times.  went 8-4-1 in Bowl Games
Under Bob Toledo, UCLA had back-to-back 10-2 seasons in 1997 and 1998, finishing #5 and #8 in final polls. 
but, starting in 1999, only finished in top 25 AP/Coaches poll 4 times in 25 seasons.   3 10-win seasons (1 under Karl Dorrell, 2 under Jim Mora).  11 losing seasons in 25 years. 
Historically, a Helmet school.  but in recent history, an average to below-average P5 team. 
A challenge for a coach - but an opportunity if that coach could find a way to win more consistently.