You look at the state of the program Franklin inherited at Penn State w/ sanctions, or Kiffin inherited at USC w/ scholy reductions, or Dooley got at Tennessee after all the thugs Kiffin brought in walked away, or 3-9 roller coaster of a program Malzahn came into, or Meyer at Ohio State with the bowl ban, or Kelley taking over Weis's dumpster fire, or Golden getting in right after the Nevin scandle, or Fedora taking over for Butch Jone's and his clan of cheaters - and all of a sudden the job Pelini took over doesn't look that bad.
Those are all things that directly impact the ability for a program to recruit and win. We weren't on probation, there weren't any sanctions or bowl bans or losses of scholarships. We didn't have 20 scholarship transfers, or donor issues. The program wasn't in a poor position financially, the fans hadn't given up. The talent wasn't at a DII level. Cally wasn't good for the program, but in the grand scheme of things nothing he did was more than a small speedbump on the way to success. There was nothing lasting about the impact he had. You don't destroy a culture built over 4 decades in 4 years.
Pelini taking over a program in shambles is an exaggeration that lacks perspective in regards to the rest of college football.