@johnafish Your original post referenced the Archer AX1800 (this product: https://www.tp-link.com/us/home-networking/wifi-router/archer-ax1800/), so my answer was about that router. Your newer...

WiFi problems can be caused by complex factors. When we're using/trying out an established product that's been in the market for years, then rarely is the problem due to its design. Since TP-Link's...