Netgear nighthawk router R6700AX streaming issues

A couple things. 

1. 2.4ghz struggles with streaming because its sensitive to interference and isn't a very fast network

2. the EX2700 is a base model n300 device. Its not suitable to streaming tv. extenders by their very nature (single/dual bands) cut throughput 50% of what their receive and with the ex2700 already pretty slow, its a poor choice

3. Your home is only 2000sqft, if it made of wood/sheetrock and you don't have the router stuck in a utility room (the metal blocks wifi), you can centrally locate it and should be able to cover the whole home

4. if not, I'd look at something like the EAX15/20. Put the primary router 1/3 in the way of the home and the eax in the other 1/3. (like this:  wall |------router----------EAX--------| wall

the router and extender both broadcast omnidirection (basically in a globe) so you don't want them right next to a wall.