Home routers are like boom boxes--by analogy they combine into one box the transport, amp, preamp, and speakers. I finally realized that all of the problems with my home network were due to trying to get hi-fi out of a boom box.
I switched a couple of months ago to separates: a gateway, a switch, and a dedicated wi-fi access point that I can locate where it needs to go rather than bundled with the router where the FiOS cable comes into the house.
I ended up with devices from Ubiquiti's Unifi range of networking equipment. My file transfer speeds to the NAS on the network have at least doubled. The stability and speed of WiFi from all points in the house has increased up to 10x (for my bedroom, for example, where my phone used to revert to its cell network data half the time). And download speed from my primary laptop went up 5x even though it was getting full signal previously (10 feet from the old router).
The router I replaced was an approximately $350 Netgear router with five antennas. I had it well configured and optimized. A boom box simply cannot produce hi fi.
As with any separates system, there is work involved to run cables, and I got a small rack to mount everything in. I also swapped out the fans in the gateway and switch to make them near silent. And I bought the little Linux-based controller box to run the system monitoring and configuration software 24/7 so I don't need to run it on a dedicated computer.
I would gladly do it again. Everything on the network now works smoothly and quickly, and the Unifi controller software lets me see all devices, the quality of service to them, the bandwidth being used, etc.
Hifi is much better than boom box.
https://unifi-nanohd.ui.com