I stopped blaming my ISP for bad Wi-Fi, and my walls turned out to be the real problem

A personal account of diagnosing persistent Wi-Fi problems that turned out to be caused by home construction materials rather than ISP issues. Covers how dense walls, bathroom tiles, kitchen appliances, and building materials absorb, reflect, and refract 2.4/5GHz signals. Practical steps include running an Ethernet test to isolate the ISP, using a Wi-Fi analyzer app to map signal strength room by room, repositioning the router to a central high-shelf location for better line of sight, and considering a mesh network for large or thick-walled homes.