No, he don't want to finish the game, he wants to constantly add news things so it's wasn't close of being done. I think that only the first part of the main story was getting close to the end.
For why he remade the game, the coding was shit. For what I know, someone else (or more that one?) was in charge of the coding and he messed up big time with it.
From what little i do understand, the old UI alone was an error mess,
It was 3 errors in one error yes it was and is that bad.
I have played this game for a long time and every gameplay i had errors.
No matter what i did, and i have always had better than average computer.
So once this catches up to the original or close to it in terms of main content girls etc.
meaning in 1 to 2 years from this year.
Then we will be seeing one error per 10 errors compared at worst.
However he should have saved up money for a big team to do the UI
then had the team do the UI etc and then added content to that one
once it was finished instead of doing what he did for several years.
But yeah he milked his patreons instead thats true...