His second year-2009-was with Gailey's recruits--mostly the 2007 class that Collins brought in. Recruiting is a big part of P5 coaching.
Your post indicates how this program declined from 2008 to 2018. Johnson beat Duke his first 6 years (not 7), then lost 4 out of the next 5. Collins' record against Duke so far is better than Johnson's was for his last 5 years. And that's the program Collins inherited, and not the one from Johnson's first 6 years.
The original post I responded to stated that Collins took a 7 win program and needs to turn it into a six win program this year. I abhor the posts on this board like that one advancing statements that are not based on reasoned facts-- either out of ignorance or due to an agenda.
From the 2018 team we lost 8 starters on defense--plus Big B who would have started at DT in 2019--and 6 offensive starters, including the QB. 14 of 22 starters gone, plus an important DT. Based on those facts I'll state my opinion that if Johnson had returned in 2019 he might have won 4 games--which he knew and is why he didn't return. I'll also state that the 2018 team would not win more than 5 games with the schedule we have coming up. I also believe that the 2021 team will win at least 5 games--it's more talented than the 2018 team and a lot more talented than the 2019 team Johnson left behind.
The program declined under Johnson and it is on the way back up. You have to ignore the bulk of the facts to see it otherwise.