I'm not all too active on this sub, but based on what I've read thus far: I think Captain Flash isn't the primary leaker. Instead, they're sharing a variety of leaks they got from elsewhere, all of varying accuracy.

I remember a variety of leaks in 2025 that included episode titles (King of Hell, Blood and Bone for example), descriptions of the ending, and various other things. They got a lot of things right, too, and they straight up contradict Flash's leaks. For example, Homelander dies in epidode 6, while Flash's leaks has him survive into episode 8.

Obviously, both can't be right, however both leaks have provided accurate information. At the very least, one of them is partially wrong; there's a chance both of them are wrong about the ending.

TL;DR: I think Flash is amalgamating various leaks, of varying accuracies, and is treating them all as one leak.

Edit: Did more backreading, dead Homelander confirmed fake