Why the hell wouldn’t he want to compete for back to back Championships

He thinks we can compete for back to back championships without sacrificing the future and is willing to invest in that future if it means this year’s team is slightly worse than it could be.

couldn’t we have used the money we overpaid Zeke and Reggie to resign Brown

No.

Seems to me that booth fumbled hard after winning a Championship

We were literally the best team in the league until Jamal got hurt.