Hello, I too have similar issues.
I use USB headset, my settings:
System volume: 40%
In-game master volume: 40%
Voice chat volume: 100%
sound effects, dialogue: 100%
music volume: 31%
My in-game volume feels perfect except for the voice chat part, it's incredibly quiet. I have read somewhere that voice chat volume is somehow linked with the system volume and that I should put it on 100% and compensate for it with in-game volume settings. The issue with this is that I'd have to do this compensation in a lot of other games, browsers and applications. I wanna lie and say my work depends on it or something but the reality is that I'm simply too lazy to do all that work for voice chat.
Is there another way to fix this?
Thanks in advance