No curse dude. All teams go thru ups and downs (except for crappy teams like Pansybilt who typically never has an up, but I digress)
Think Alabama, Notre Dame, Michigan, Nebraska, USC as recent examples. We made a change away from Phil after a great run which included a national championship and about a 150-50 record or so. But we started to decline over 4-5 years so Phil was gone. Made 2 very, very bad hires for which we have paid dearly. These types of things happen to every major program over time. I think Alabama went through about 5 coaches and some really bad seasons after Stallings before turning it around, to say the least, when Saban came to town.
There's no curse. Just gotta coach the team and manage the program better to start winning again. I think Butch is gonna do both.