Having the same issue here on my 6700XT. I didn't have any text issues back on my GTX 1070, so have reason to believe this is an AMD-specific issue.
And yep, compatibility mode fixes the artifacting in the text but the it still looks squished. Back on my 1070 it looked fine. From what people are saying it might be due to unsupported old DirectX functions but I don't really know much about that.