Have you tried switching your system to plain stereo and using decent headphones? If that makes things very much better, it would suggest your speakers and or room acoustics are contributing to the problem. The fashion for minimal furnishings and bare wood floors do nothing to help clarity. My choice for TV speakers would be BBC LS3/5a. An old design but still not bettered IMHO for general use where you don't need to rattle the windows. Perhaps with a sub if you listen to things with low bass.