Do you consider South Carolina a bad loss? I do, their RPI may be in the 90s but that doesn't mean as a top 15 RPI team we shouldn't have crushed them.
At the time of the loss I certainly did, but I don't think they're necessarily a bad team, and if their RPI is in the 90's I think that takes some of the stink out of it.
IMO, and this is just me, both wins and to a lesser degree losses against the RPI 100-150 are kind of "meh" to me. The wins are expected and no big deal, and while you never want to lose a game a loss to a team in this range isn't necessarily a season killer, unless you're squarely on the bubble. Thankfully both UNI and ISU are in positions where their bad losses aren't going to be the proverbial nail in the coffin, although that horrendous loss at Tech is one of the reasons why Kansas won the Big 12 again...grr....