Beyond the question of how athletic or talented guys are, or how good the schemes are, the team plays like it's afraid to lose. So much of that is due to the constant mention of "years since blah blah blah". It affects every team. Georgia has a mental issue with Alabama. They come out looking out of sorts every time they play Alabama.
Best thing to do to get out of that issue is say eff it. We don't care about the bowl streak. Just focus on being better everywhere, all the time. And the fans and media need to stop wallowing in it. Stop talking curses or poo pooing over a coach that was fired and wasn't very good to begin with. The team absorbs all that.
Part of the reason for the comeback was the game felt lost and the team visibly relaxed. As the comeback narrowed to a possible win, they tensed up again. Missed extra point, etc.
Satterfield's play-calling, slow DBs, and Raiola missing wide open receivers matters. Those are fixable things. Nobody can go back and make the Frost years better. Forget they happened and focus entirely on this year, these games and not years past.
Get that psychological monkey off the back of the program. Indiana hasn't been good forever and I guarantee you their players feel completely unaffected by what happened before they arrived.