But here is the issue.. Prohm's first two years he did maintain the same level of basketball as Hoiberg. He made a Sweet 16, won a Big 12 Tournament, and won 3 NCAA tournament games. In Hoiberg's final two years, he made a Sweet 16, won 2 Big 12 Tournaments, and won 2 NCAA tournament games. If you didn't think there was going to be a dip in quality and success after arguably the best core of players left the program, then I don't know what to tell you.
Do you know why people wanted to come to Iowa State to play? Hoiberg. When he left, I'm sure lots of big time transfers and recruits were a little bit reluctant to come Iowa State because "The Mayor" was no longer there. I have no idea if anyone outside a big named guy would've been able to come in here and attract talent right away. That's why it took Prohm a little bit more time to be able to recruit high level guys. And with the rule changes and how the structure of the NBA / G-League has changed, those high level guys are now leaving early. If these same rules were in place when guys like Georges and Monte were here, I have no idea if either of them would've made it through there 4 years here.
Prohm has to adjust. Other coaches are having to adjust. College basketball is changing. Fans, boosters, and the AD have to show some sort of patience or else this program is going to turn into an endless cycle of coaches and the successful seasons will be outliers instead of consistent. Hoiberg was one of only a few coaches in all of college basketball that was able to come in and turn a program around in about two years. Look across the landscape of college basketball, specifically the successful ones, and you'll find far more coaches that had to fail before they succeeded than you'll find coaches that built a successful program in the matter of 5 years or less.