Thanks for posting that. I had seen it earlier but hadn't gotten it here yet.
People can be tired of blaming Riley all they want. The fact is the offensive guys he recruited have almost all been busts.
Using the above names, here's how much Riley's WR recruits have contributed by year:
2015 - 0 receptions
2016 - 0 receptions
2017 - 68 rec, 925 yards, 2 TDs
2018 - 87 rec, 956 yards, 8 TDs
2019 - 59 rec, 990 yards, 5 TDs
2020 - 5 rec, 40 yards
So Riley got by for two years relying exclusively on Pelini recruits. Then there were three years that all of Riley's recruits combined to be the equivalent of one good receiver. And, for all intents and purposes, that's all there was. It's pretty tough to try to run an offense when you recruit one contributing WR in a three-year period.