Steam Remote Play SLOW / stutters / buffers when In-Home Streaming - it connects via Relay and not Direct (no SteamLink)
When Valve released Remote Play, it seems there's a bug where multiple network adapters (from VPNs, virtual machines, etc.) can cause direct connections to fallback to relays too greedily. You need to force the IP connection.
Open Steam Console ( if that link doesn't work, paste this into windows run: steam://open/console
)
Run this command connect_remote <ip>:27036
where is a local IP of your host PC
You should see ping as <1ms
on wireless (set router in N-only 5ghz, highest channel bandwidth) or better yet, wired.
Don't forget to enable hardware encode/decode on host/client.