I think the fact that we were playing some third string players at defensive line in this game may have had something to do with it. Hope we get some of them back for the future MAC games. The targeting call sort of hurt too.
DL weren't playing in secondary. Safeties and DBs were getting torched ... that's not all on pass rush. Similar problems vs. Purdue (and previous seasons)
While watching us get torched in the secondary was disheartening, the most frustrating thing was how many times we were one play from really putting the game away and just never came up with the stop. Settling for a field goal after 1st and goal after the interception (although a blatant uncalled PI/hold should have set us up at the 1). giving up what seemed like 25 4th down conversions. Yeah, the two times we got stops were both big, but if we had just stopped half of them, this isn't even a game in the 4th quarter. Kansas was one thing... we controlled that game wire to wire despite giving up some points.
Also, we were a fairly clean team this season. But this game looked a little too much like 2015-16 with all the drive-extending penalties. Even when we did something right, we would shoot ourselves in the foot.