Do you have other VMs? If yes, how is the performance on other VMs?
Please check If the adapter driver and firmware are up to date. If yes, you can try to disable VMQ on physical NICs using the Set-NetAdapterVmq Windows PowerShell command.
You can confirm that VMQ is disabled by using the Get-NetAdapterVmq Windows PowerShell command.
And I think the following article may be helpful for you:
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