I've set up like 5 of these for friends, and they all love it, its the cheapest best box for setting up your piracy stuff imo

I have pinchflat set up for downloading and jellyfin set up with libraries to pick those up automatically. It works really well.

Could it be your DNS provider?

you want a onn tv box from walmart. it's $20. $40 for the pro version (which does perform better). combine that with stremio and projectivity launcher and that will give you pretty much everything you're asking for.