Oh man, i hated what characters and story became either but i never thought you felt the same way.
I would really love to see it going further and recovering from what it became but if you feel the same way i guess there is no point for going further....unless if there is a chance for deleting the parts after the 'breakpoint' from your point of view, discarding episodes and story afterwards wherever that breakpoint is, telling people 'Think it as these stuff not happened and released' (Not joking, i guess fans can take it if it will progress further in a better way) and then, you know rewriting whole thing from your own perspective, with knowing what can be bad for Taffy Tales and not making same 'example' mistakes again.
Is it possible for you to going with it with doing this or something like this? We can surely consider some stuff never happened and go with your second try.
A question, i don't know how many people worked on the project or if someone effected or pushed the plot at some direction or not. You sound like your progression path with the game somehow affected by other/others while working on it. Something like that happened or this is just me making a wrong guess?