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I have the same sound issues with a lot of stuff, my current theory at this point is that TVs have gotten bigger and we're further away from them but speakers have stayed kinda shitty... but things are being mixed by people using headphones or otherwise good sound equipment it's very funny how when watching a movie on my macbook pro it's better for me to just use HDMI for the video to my TV but keep on using my MBP s…
It is a well known issue: https://zvox.com/blogs/news/why-can-t-i-hear-dialogue-on-tv-... I don't find the source anymore but I think that I saw that it was even a kind of small conspiracy on tv streaming so that you set your speakers louder and then the advertisement time arrive you will hear them louder than your movie. Officially it is just that they switch to a better encoding for ads (like mpeg2 to MPEG-4 for DV…
Film makers want to preserve dynamic range so they can render sounds both subtle and with a lot of punch, preserving detail, whereas ads just want to be heard as much as possible.
Ads will compress sound so it sounds uniform, colorless and as clear and loud as possible for a given volume.