I recently installed a fresh Win11 and with this tweaks it is superfast. Explorer 1 sec Windows Store 1 Sec Firefox 1 sec to open. Did you set the energy profile to high? We could also continue in german.
simply use this script and win 11 ist fast as vm
https://github.com/MysticFoxDE/WINDOWS-OPTIMIZATIONS/blob/main/W10ANDW11-NETWORK-TCP-DESUBOPTIMIZATION.ps1
I am not the creator, I can only tell it works. Espacially on 2022 Servers and Win11 VMs. But also on Windows 10 the Network Speed in the VMs has changed.