I’ve been in similar situations while renting. I ran ethernet cables along skirting boards and around doorframes and hid them inside adhesive cable raceways.

Is this for movies and tv shows? I fix it at the output level and leave my rips unchanged. Check your TV or AVR for a “night mode” or “dialogue enhancement” or use the “reduce loud sounds” system setting if you’re playing back an AppleTV.

If the issue is specifically quiet dialogue and loud action scenes, get a dedicated center channel and boost its volume by a few dB.