A lot of actors whisper their dialog instead of speaking it (trying not to appear too "manly"? I don’t know). Gets on my nerves...
Here's Why Movie Dialogue Has Gotten More Difficult To Understand
A friend sent me this article. It is a pretty long article, but it is full of details on why this happens. There is no "fluff" in this article.
I found it completely fascinating. There are a couple movies I have noted that have had excellent audio (and video), but I’m sure there are many more:
Wonder Woman - this has absolutely excellent audio and video quality. Everything is very high resolution and mixed extremely well. I actually use this movie a lot for testing audio/video in different situations.
The Twilight Saga: Breaking Dawn - Part 2: (yeah, don’t laugh at me). This movie has very high video resolution and clarity in the beginning scenes (as well as many other scenes). One of the sharpest and highest image detail I have seen. The audio is very good as well.
==== on the other hand ===
Star Wars: Episode IX: The Rise of Skywalker - this movie has absolutely horrid audio. The mix is much lower than what you need and audio clarity absolutely sucks. This was just a recent movie I watched, but I have seen many action movies where the audio is loud enough, but it’s a complete mess.