RNG explicitly said that a bad ending will have a “go back to a branch point” option. So the argument about the “rebirth” theme not being respected is kind of pointless, because that’s EXACTLY what he’s doing.
But that’s beside the point. You don’t like his approach to unlocking skins? That’s valid.
However, the whole “the community” and “long-term backers care about the theme” claim isn’t proven (or backed by any meaningful data), so it’s not really credible. As another user said, it just sounds like your personal opinion expressed in a plural or group-wide way to make it seem bigger or more relevant, which, I’m afraid, I have to disagree with.