Can someone please help with optimising these headphones I just got?

I bought the Razer Kraken Kitty V2 BT Quartz Edition and it arrived yesterday, but I had to wait for a bluetooth adaptor to arrive, which I only got today. While testing the headphones on my phone and laptop they sounded fine but they literally sound so terrible on my PC. Like I just tried to play a game and it genuinely sounds like I bought a $5 headset and spilled water all in it, and I have no clue why.. Is there a way to optimise it or something? Everything is either way too muffled or way too loud and boosted all at the same time.