That’s how it’s supposed to sound. Explosions are loud.
This is not a problem with the source material, it’s a problem with the setup of the playback equipment. The source contains all the original data, it’s the playback equipment’s job to render that information in the appropriate way considering the space and circumstances where it’s played.
The ‘problem’ is that the sound is mixed to a cinema-level dynamic range. If you don’t want the full dynamic range you can compress it at playback. They store it at the full range since you can’t exactly un-compress it and the exact amount of compression depends on your setup and situation anyway.
Any half-decent A/V receiver has this capability. If your receiver has Audyssey you may want to look into the “dynamic eq” and “dynamic volume” settings.
(https://support.apple.com/en-gb/guide/tv/atvba773c3c9/tvos> "Reduce Loud Sounds")
It’s not the movie maker’s job to adjust the sound to your particular environment and taste. That is the job of the playback equipment and the person configuring it. The movie should be, and is, stored at the highest fidelity and with as much information as possible. This includes the original intended dynamic range. If your situation or taste calls for a smaller dynamic range you can easily adjust that at playback.
You can hardly expect movies to include hundreds of different soundtracks to cover all possible playback scenarios.
The problem is that dialouges are incomprehensible, inarticulate, while the sound effects and the musics blow your head off in the next second. Lately, not that much previously. Previously this was not a problem, recently they lost their ability to make it well. Many of the movies became not entertaining but agitating this way.
It was never a requirement that everyone will have their own particular personal taste satisfied and that is not something that is missed. More like the ability to be able to follow the story! Which is ruined in more and more cases by bad sound.
When my family was going through all the Marvel movies at first I tried to control the volume by making it higher during the dialog and lower during the battles etc but it was an exercise in futility, as I'm only human and there would be some delay in volume change and we would still miss what the guy/gal said or my house would start noticeably shaking from the unexpected explosion happening during a scene where a guy was intensely whispering his rescue plan to his compatriots or whatever. Plus it started feeling like I'm working instead of enjoying the movie. So lower volume and subtitles it is.
I have home theater with 5.2 and 5 speakers, all it does is that when stuff in the movie goes boom my house starts to shake.