Your beef should be with who hired Arnett. I don't blame Arnett for trying to be his own man rather than try to do a Leach impression. He might fail as HC but he would definitely fail trying to fill Leach's shoes with Leach's guys.
I disagree, I think continuity was the right move in the situation. I don't think many would have been upset with a year grace period. We are stacked with seniors and we will lose most of them next year. That will be the perfect time to transition to what Arnett wants the offense to be (and what most of us fans think it should be, as well). If we had failed, then Arnett could have moved off of those guys.
Just a bad ego look from my viewpoint. Regardless of what the Goat-haters here think, I'm not rooting for him to fail. I just saw this coming from a mile away, hoped it wouldn't happen, now it seems to be. It's just frustrating. 2018 was bad too and it sucks to know we may go through that again, in such an opportunistic year. Maybe we can get it turned around.