Let me tell you about the hell that is Roku. They create so much wireless interference and I can’t just get rid of them.
The problem stems from WiFi direct. They automatically scan for the busiest channel and then broadcast full strength on that channel. I don’t know why they do this but it creates a crazy amount of interference.
And before you ask, no you can’t turn WiFi direct off. Also the remote uses WiFi direct for some reason.
WHY, ROKU WHY!
You’re much better off with a mini PC running Linux and Kodi.
I have an Nvidia shield for now, and run Plex on unRAID. I will be moving to a HTPC one the shield goes tits up. For the most part, I consume my media from my PC, but if I’m using the TV, it’s currently my shield.