i’ve had the same experience on two tvs, one with a sonos sound bar and two mounted rear speakers, and other on a proper 5.1 system. it’s absolutely a mixing/mastering issue as the problem is present on different systems and to varying degrees with different movies/shows.
edit: i should add that it could be a hearing issue too; i’m sure we all have some level of loss at different frequencies. i sometimes have issues with conversations in restaurants with lots of background noise, as an example.
