Godfather Part III (1990) might be considered an easy target, but even if Winona Ryder had stayed in the movie instead of Sofia Coppola having only 2 weeks to prep for that role as Ryder's replacement, the movie itself still would have been terrible; Sofia Coppola took the brunt of that movie's criticism in 1990 because she was clearly not fit to be given such a prominent role in that movie. It was just all around bad, the acting was just forced and ho-hum at times, the movie was about one hour too long, and I personally thought it was hilarious that Talia Shire was reduced to reprising her Adrian Balboa acting schtick to salvage something out of her role as Connie Corleone, because that was who she reminded me of. Francis Ford Coppola really batted a no-hitter with this one, which is regrettable because this was supposed to be the end to a fantastic trilogy, not leaving you with a bad taste in your mouth.
I took a chance back in January and bought
The Godfather, Coda: The Death of Michael Corleone (2020). I'm not sure what all that Coppola did to "fix" his movie, but it is a much more watchable film than his original. He basically just moved a few sequences around; one that took place about a half hour into the film now starts it off, but a lot of the rest of the movie is the same as the original 1990 version. I still prefer the first two films to this one, but now this newer version of the 3rd movie is not as bad as it used to be.