Paul George is signing elsewhere and Billy Donovan is gonna be the fall guy.
Still, Westbrook + Adams should get you 41+ games for the next 3-4 years at least, so they're not doomed as long as they're OK with not actually contending.
So playing .500 while missing the playoffs and not being able to add anyone good and probably not see a top-10 pick for several years is something to be happy with? They won’t even be able to trade Westbrook with that contract.
Adams is a stud though. Really like his game and personality.
That said, I can’t think of many (if any) teams with a worse forecast than OKC. Small market, no true prospects, drastically-overpaid aging star. They will never be contenders with RW as their best player. It’s debatable whether they could ever attract a star better than him, and now it’s severely unlikely they could ever afford him.