Please don't confuse this for "movies that are bad that you actually like".
You can hate these movies all you want yourself too.
The only thing I'm asking for is movies that were considered to be bad, but had effort put into making them and you can tell people actually cared.
Like movies that the people making them thought they might be making one of the greatest films of all time, but it just wasn't received well by anyone.
Of course directors are an obvious place to look to for "people who cared".
An example might be something like
Inherent Vice which a lot of people really disliked, but clearly they were trying to make a good movie.