re: Not sure if I need a new router or extender...advive needed

I had a single centrally located router and finally upgraded to a Ubiquiti solution. Did this cause i wanted more control and analytic capabilities within my home setup.

First, do you rent a modem from your ISP? If so I would encourage to purchase your own modem that matches the capabilities for the service level you have now, or may upgrade to in future.

Second, are you connected to everything via WiFi or have any wired clients?

Third, have you checked to see what channels your 2.4/5 WiFi networks are using? Would assume it’s probably on auto but you could find some improvements there by specifying less congested channels. Also, does your router allow you to configure power signal levels of your wifi networks? May be something to check into as well.

Finally, you can use the all WiFi SweetSpots to measure the signal and connection from every room in your house so you can understand potential dead spots.