Exact same experience here. Just bought 4 of them and my Nest and IoT devices have very poor wifi performance. I had a Google Mesh system before and it was much better. I needed to upgrade for the multi-gig support.

  @МайклКо 

how funny it is when people write angry comments that are not supported by any solid evidence of a competently built network infrastructure

First, provide a diagram of the installation and connection of access points in your home.

their location, how they communicate with each other, via ethernet cable or wifi, if the latter, what is their signal level when connected.

is there any noise from other nearby access points, for this you need to walk around and monitor the area using a wifi analyzer on your phone.

 

In general, buying a couple of simple points in terms of positioning and setting up in a multi-story building, connecting them via WiFi and hoping that everything will work stably is a rather naive opinion.

for such purposes, at a minimum, cables are laid between floors so that the points are connected by cable.

Well, in such cases, they don't use simple access points, but more professional ones, for example, the omada solution from tp link

The points are located either on the wall/or on the ceiling, which are powered through a poe switch.

at each point, the width and number of the wifi channel are recorded in different ranges depending on the settings of other points and the presence of noise from neighboring access points.

This is a smart and stable solution.