Hey there Andrae Snegirev,
I'm so sorry for the late response, but I wanted to hop in here to help. I understand how frustrating it might be to not be getting the speeds that you're hoping for, but I'm happy to look into this.
What does your network structure looks like? (e.g. Modem --> Switch --> other devices connected including the Google Nest Wifi router --> etc.)
Also, check your device placements & a possible Wi-Fi interference - Finding a good place for your Wifi devices can be a little challenging as wireless connections are very sensitive, anything that interferes to it or may cause congestion would really affect its performance. If you have 1 Google Nest Wifi router then your network is expected to get up to 2,200 sq ft Wifi coverage. However, there's a possibility that it might also interfering with the signals and traffic from other Wi-Fi networks which resulting for the area to be congested, especially if it’s sharing the same channel with the other wireless networks. Also, you may want to check if there are other wireless devices near your Google Nest Wifi router such as Microwave, Cordless Phone, Wireless speakers, Bluetooth devices etc. as they can cause a frequency interference. Try moving those type of devices away from your router, if possible.
I was also able to find this article that may help you as well.
Unfortunately there isn't a secret trick to unlocking more bandwidth, but let me know if you have any further questions or concerns.
-From Garrett DS, Community Specialist.