Stripped lockring threads

Well I kinda thought that's what was being alluded to, but let me say this: I'm always careful with this kinda thing , the sprocket and lockring were always done up tight with a bit of anti-seize, a hard dose of forward pedal and I'd check the lockring again. There was no play at all as far as I could feel.

Could I still have done it wrong? Or is it possible that the hub just sucked?

In either case, the original questions are still relevant. Do more expensive hubs have stronger threads? Etc

You don't mention chainwhip and lockring spanner anywhere. Go buy the proper tools, learn how to use them and save money on hubs.

100% user error.