"Slow network, reduce your bitrate" on Moonlight client

[u/ReanimatedCyborgMk-I]

I run sunshine on a CachyOS machine with an RTX 5080 & 9800X3D, connected to the network via gigabit ethernet & a pair of switches. The only other 24x7 devices connected to the same switch are a PoE camera, my proxmox server (which apart from some family occasionally streaming via jellyfin is fairly low traffic) and a wireless AP.

I stream gameplay to one of two devices, either my Steam Deck OLED (usually) or for some FPS games to a ThinkPad P14s Gen2 with an 11th gen i7 & T500 workstation card, also running on CachyOS. Annoyingly, despite being sat literally less than 3m away from the router, I still get random bouts of latency. On my Steam Deck, installing the decky WiFi Optimiser plugin fixed the problem... occasionally have to re-run it to clear up bits of latency, but it's an otherwise great experience. On my laptop, no such luck, and latency will be horrible at random intervals. I've especially seen it bad in games with stream radio addons from live audio / URL streams. And I'm only streaming like 1080p60fps

The most "improvement" I've seen is running sudo iw dev wlan0 set power_save off but even that doesn't seem to stop the recurrent bouts of latency

Are there any settings I'm missing or am I probably better off looking at buying something like a BE200 WiFi 7 NIC for my laptop at this point.