If you are under Win10-- have you installed Beta of their drivers bundle?
If you are under the Linux – you have to install Intel Linux firmware instead of the stock one( for Ubuntu 21.04 – the stock firmware was a disaster from the performance perspective).
It’s definetly not that bad. But its drivers even for Win10 need improvement.
You can check my experiments here:
and here:
I have to admit the AX201 is faster than AX210 even for Win10. But the performance is definetly not that bad as you describe – for me it’s at least ~160-180MBPs dowload speed under Win10( and I have 300MBPs plan).