Did you get streaming services to stream 4k? That was some bullshit I discovered when I bought my first 4k TV, that streaming services artificially limit quality for browser and Linux streaming.
What is you solution for remote controlling? I used one of this mini keyboard+mouse combo in a shape of controller, but mine was really trash. Most of the time I used a good mouse that worked ok on the couch surface and some mouse binds to pop up a virtual keyboard. But I was never completely happy with the solution.
When the game let's you rebind some but not all keys it is like spraying lemon on the wound, at least when no key is refundable you can guess they could not be arsed to do it, but when they just do a shitty job on it is like it was almost there, why not do it right?