Is it the NVMe device driver or is it something else in Windows 11 (I think it is something else)? For me, whether I use Microsoft's NVMe driver or Samsung's, it is essentially the same result (with very low random write speeds in crystaldiskmark). So the NVMe driver doesn't seem to be the cause.
And it has nothing to do with AMD vs Intel either. I have an 11th Generation Intel CPU (Intel Core i5 11400 -- Rocket Lake).