Router/mesh recs?

home wifi problem can be cause by signal interference as multiple wifi access points use same wifi channels.

there are many wifi channels (https://en.wikipedia.org/wiki/List_of_WLAN_channels)
i use wifi analyzer app (e.g. https://play.google.com/store/apps/details?id=abdelrahman.wifianalyzerpro)
to find channels not used by my neighbors wifi then set my AP to that channel.
using channels in 5+ GHz bands will also reduce interference probability as they have more channels than 2.4 GHz band.

setting AP to 20 MHz, instead of 160 or 80 MHz as default in new AP hardware, will further reduce interference probability.
it also reduces power consumption of wifi clients (smartphones etc.)
20 MHz will give around 200 Mbps which is actually more than enough because a 4K/UHD HDR stream only needs less than 25 Mbps