Yes, it says it’s forever. The Catholic church does have a doctrine of purgatory, but it’s for the flawed faithful.

But it also treats it akin to a spouse that has been continuously cheated on; all his gifts twisted, broken, and trashed; finally leaving the house.

Or self-inflicted by humanity, God going: “do you really, really want to stay apart from the source of life and all good? Then have it your way… ☹️”