I actually exchanged my CF because it was crooked, so I'd tell you to exchange it. I think I'd let go of the bag altogether if that were the only one. It's a pretty penny to be spent on something that is going to bother you.
However, a tip if you're considering keeping it at all: Try stuffing the bag with some clothes/cloths and see if that solves the crookedness. If it works, it's more likely that something pushed the flap up a bit higher one side. If it doesn't, it's likely structural and just won't change.
If stuffing seems to somewhat solve it, I'd keep the bag stuffed for a day or so and see if that kinda readjusts the flap a bit.
However, a tip if you're considering keeping it at all: Try stuffing the bag with some clothes/cloths and see if that solves the crookedness. If it works, it's more likely that something pushed the flap up a bit higher one side. If it doesn't, it's likely structural and just won't change.
If stuffing seems to somewhat solve it, I'd keep the bag stuffed for a day or so and see if that kinda readjusts the flap a bit.