What do you want from me?

Did I not explain that he was making lemonade out of lemons? Are you not aware why we had so many inexperienced freshmen and sophomores starting his last two seasons? Here's the 2019 offensive class that Long and BK put together by ranking:
Zeke Correll - Former starter, now transferring after getting replaced
Andrew Kristofic - Mostly career backup behind underclassmen
Quinn Carroll - Transferred
Kyren Williams - Star
Kendall Abdur-Rahman - Transferred
John Olmstead - Transferred
Brendan Clark - Transferred
Cam Hart - Moved to Defense
And 2020:
Michael Mayer - Star
Tosh Baker - Beat out by Alt when he was a freshman
Jordan Johnson - Transfer
Chris Tyree - Major contributor, transferring now
Michael Carmody - Beat out by underclassmen
Xavier Watts - Moved to Defense
Kevin Bauman - Injuries
Jay Brunelle - Transferred
Drew Pyne - Transferred
That's it. Out of two whole classes we had two decent contributors and two legit stars in Kyren and Mayer, with Kyren being gone for Rees' last year. The rest of those classes are either transferred, moved to defense, or have been more or less buried on the depth chart by younger players. How many OCs are incredibly successful with a platoon mostly filled with underclassmen? Why has Alabama been so successful? Aside from superb coaching, they never have more than a few underclassmen on any side of the line because they recruit well each year. There's rarely holes, although they did have one at QB this season which is why it took Milroe time to get acclimated. Upperclassmen should be the backbone of your team each year. We didn't have that for two straight years in 2021 and 2022 offensively. We're still feeling the effects of that at WR with the young group we have, and that's certainly on Del and Tommy for not having a backup plan when what's-his-face bolted and only Merriweather was left. You wanted to know why our offense struggled for a few years under Rees? That's the number one reason.
You say Tommy left us at a bad time. Maybe so, but only from the perspective that he was building something and didn't see it through to fruition. These Juniors were his first class, and the heart of the offense. While the jury is still out on some of his recent classes till they mature, I think you would agree that Tommy left Parker off far better than Long left him from a talent perspective. This team clearly had the talent and experience to be very successful based on the points we put on cupcakes. If you were in Rees' position and Saban came calling, knowing it would likely be a stepping stone to an NFL gig or P5 HC job...would you not take it to further your career? As fans we may say hell no, but realistically no man in his right mind doesn't take that opportunity.
He had the opportunity to go last season and stuck around. You talk about leaving at a bad time, now that would have been a bad time to go. Let's assume Parker takes over in 2022, because I seriously doubt any other OC wants to come in and coach a bunch of Sophomores last season. Do you think Parker somehow beats Marshall or Stanford with that 2022 team? Do you think he pulls Pyne's head out of his ass against Cal? Does he beat South Carolina, BYU, or even Navy? We were probably looking at a minimum 6 losses last season if Rees doesn't stick around another year.