How much of that is on the QB though? Play call, WR, bad bounce, pass protection, great defensive play lot's of things go into a pick six. That's certainly what Lee is remembered for. Here are his pick sixes compared to Armstrong's in 2015.
INT for TDs
Northern Illinois in 1st quarter, we lost
Northern Illinois in 1st quarter, we lost
Buttgers in 3rd quarter, we won
WiscyDicks in 1st quarter, we lost
2015 Armstrong
Northwestern in 2nd quarter, we lost
Cockeye in 2nd quarter, we lost
Don't get me wrong, I don't think Lee was a good QB, but I do think that he gets an unfair amount of hate from Nebraska fans. He wasn't much worse than Armstrong and had to do it in a very tumultuous environment. Everything around the team in 2017 was a mess, DC was terrible and the HC was a dead man walking after a few games, the fans were more concerned about Frost and UCF than the Nebraska team. Just find it odd so many fans think of Lee as bad and Armstrong as good, when they were actually just different shades of ok.