When you face really good coaches and players, especially for the 2nd time in a round robin, you have to make adjustments. I know it might be difficult to see for people who don't understand basketball and only look at stats/rankings, but this team has had problems for a long time.
The struggles were very evident before this week's losses, but Prohm hasn't done anything different in his gameplanning. In fact, his 4 years here have largely been the same thing. Year 2 he got the guys to play a bit more pressure halfcourt defense, which resulted in a number of steals and more transition points. But offensively it's the same stagnant actions. He always wants a side ballscreen but it's not effective. No counters to how it's being defended. And further he doesn't know how to defend ballscreens when opponents run them against us.
Whatever system you decide to run as a coach, you better know it inside and out and know what adjustments are needed. Steve hasn't shown that ability. Having really good players can help hide flaws. Not a bad thing to have good players, but fans can really be blinded just because tough shots are being made.