I'm thinking there is something wrong with your PC .. not a 6700XT issue
More info would be helpful
CS2 runs just fine on my mother's iGPU in her Ryzen 5 7600
CS2 runs just fine on my wife's 5700XT
I wish I had my duaghter's and my own setup set up (we just moved into a new house) to type
CS2 runs just fine on my daughter's RX 6800
CS2 runs just fine on my 7900XT
... but they are still in boxes so I can't