How can I improve the sound quality of 5.1 audio on my TV?

It could help to play around with your TV's equalizer settings if available. Boosting the middle frequencies can make voices clearer while lowering the highs and lows a bit might reduce the harshness of sounds. If it’s still not working, you could consider getting an external soundbar, which usually handles audio better than built-in speakers.

You might want to check your TV's audio settings. Sometimes, there's an option to adjust the balance between different sound channels. Look for settings related to surround sound or even try switching to a 2.0 or stereo output if it’s too much. Using a sound mode like 'Movie' or 'Music' can also help balance the levels better.