I see it more as warriness than hatred. Whether or not they act "good" now, they have a near monopoly. It has a lot of potential to go bad for us consumers, even if the probability might be low. Murphy's law apply: if it can go wrong it will, someday.
Tbf I don't know much about the Hyprland history. The point raised by the OP on the forum links to tweets by both framework and Hyprland accounts saying framework became a "gold tier sponsor" of hyprland. It's fair to assume that involves a donation.
I see it more as warriness than hatred. Whether or not they act "good" now, they have a near monopoly. It has a lot of potential to go bad for us consumers, even if the probability might be low. Murphy's law apply: if it can go wrong it will, someday.