Every time a friend tells me about getting a mesh system to cover dead zones in their place I cringe at the thought of more 2.4 GHz blasting everywhere. 99% of the time the problem can be solved by better placing their current access point, whether that means moving their ISP provided router/AP, or installing a standalone AP and disabling whatever they're currently using for WiFi.
I don't really know the answer to fixing the issues but it seems to me it's not technical, it's better information about placing the devices. End users just want it to work but don't have the time to learn how to best do that. ISP installers are not incentivized to care either, install as cheap and quickly as possible and get out.
Mesh definitely isn't the answer though. It's the anti-answer.