I own a 6700xt and also play in 2k - there’s a great price quality relationship with this card and it performs great. This card will absolutely do the job and way more than enough - Unless you want to experience ray-tracing or VR but also linux sadly is not the best platform for those features

Would setting up a raspberry pi-hole do the work? Asking from ignorance but IIRC, at least in the past, it got the job done

I didnt know this was a thing, in my country they just pushed back expected delivery dates from 1-2 weeks to 2-4 weeks