Yeah, that's not ok. I thought I was buying your game. (understanding it was still in development) Nothing in the description indicated I was only buying "that version". Every other game on itch you buy the paid version of the game, you get all the further versions of this game. You seem to have gotten around this by listing 0.8 as a "new" game, but that's not the case. I don't care about parity between systems, I didn't sign up for patreon cuz I'm not paying you monthly for an unfinished game.
This is not about agreeing on a "point of view". You are committing fraud. If you do not reverse this policy, I will report you and I do not think itch will look on it kindly.
I bought your game. Not just one version.