The biggest problem while playing this game is audio cutting in and out every 3-4 seconds. It becomes a huge issue in combat. I can understand rest of the bad performance as they are still developing the game but they should at least fix the audio thing. I have around 14 hours in this game and the audio issue is quite unbearable at times and has caused me to get distracted while in combat. I am using Xbox headphones with bluetooth adapter, I tried without adapter too and problem is still present. My performance ranges between 45-60 fps but that is not really an issue at the moment. Today I played it on my soundbar which is connected through aux cable and audio didn’t face any cut outs, just the usual hiccups.
i am no expert, but it sounds like your headphones and/or your Bluetooth has some issues. i played the game with soundbar and headphones, and aside from some known bugs with sound cutting out in specific areas i did not have any issues.
maybe try some troubleshooting. try different headphones, try different Bluetooth adapter, try different windows Bluetooth settings, disconnect and reconnect your BT device etc.
ideally you would do one thing, see if it is better and solved the problem. if yes, congrats you found the faulty part, if not, try the next thing.