@Hector1 

What would be best for me may not be the best for you.

Things I would do:

• Turn HomeCare and like products off.
• Use different SSIDs
• Use strong Passwords
• Use the strongest encryption
• Use default settings for the other WIFI parameters unless a change is needed.
• Use both IPv4 and IPv6
• Do not use QoS unless needed.
• Use the Auto settings for channels and band width unless I need to change them for a specific reason.
• Router placement is important (direction of route, direction of antennas, central location away from objects that can cause interference, not in closet or bookcase)
• Give router room to get air.
• Use good quality Ethernet cables.
• Balance load on both the 2.4 and 5 GHz bands (note 5GHz is faster and 2.4 has more distance)
• Attaching slower devices can slow the network.

More info at https://www.duckware.com/tech/wifi-in-the-us.html

@Hector1 

Here is an article that talks about factors that affect Wi-Fi.

As far as the router you can try changing the channels and width to different values. Download a Wi-Fi analyzer to see what other routers are using so you can set your router to run differently than that.