:) this is the way: "use Proxmox 7.x and not upgrade, or upgrade through to 8.x but pin the kernel at 5.x" :)
you can build use the out of tree intel driver, however performance is horrible compared to 5.x in tree drivers. latest intel drivers: ~4G,10G rx/tx, Linux 5.x drivers: ~7G,10G.
I'm...