The red zone issue actually goes back to Gruden. The Raiders have been one of the worst teams in the NFL in the red zone for some time and from what I'm seeing, it's a combination of conservative playcalling (think Saints 2022) and bad throws/decisions. I've just seen some plays that remind me of that crap that PC was calling last season.
And here is the catch 22:
Carr's individual stats improved with the conservative approach of Gruden but it also left a LOT of points on the field (again, think Saints 2022). DA wants a conservative offense and PC made sure to cook up one of the most stale offenses he can think of. There has to be changes and the red zone has to be a major point of emphasis.