And this is why I went separate AP from router. You can easily get a commercial grade Wifi AP that doesn't do anything else other than WiFi. They're stable and include the latest standards.
Meanwhile, I run my own Linux router on a Raspberry Pi. It covers all the wacky edge case needs I have such as Wireguard, VRFs, VLAN, etc.
Yes. I can achieve line rate throughput (940mbps measured tcp throughput) with a USB 3.0 gigabit dongle on one side, and the built-in ethernet on the other.
Out of bos without tuning, it's more like 750mbps maximum throughput. Most of the optimizations are pinning IRQs and RX buffers to particular CPU cores, otherwise it'll max out one core and limit the throughput.
I'm routing and forwarding, as well as stateful firewalling with nftables.
Meanwhile, I run my own Linux router on a Raspberry Pi. It covers all the wacky edge case needs I have such as Wireguard, VRFs, VLAN, etc.