Thanks for reaching out to us in our community and welcome, I am sorry to hear your having issues and feel you aren't getting the correct Wi-Fi speed,
In order to check your speed you would need to put the router in modem mode and connect only one device via a cat 6 or above ethernet cable, please use speedtest.net by ookla to run the test.
If when ran you are still having issues then I would advise you to set up a free “Broadband Quality Monitor” to continually monitor the state of your connection and record any network dropouts. It does it 24/7/365 and it keeps a visual record of any/all of your network disconnections, useful data to have to match to the Network logs (in your Hub settings) and also in discussions with us. Make sure you uncheck the “ignore ping from WAN side” box in the settings if you see a wall of "red" - note it will take an hour or two to start seeing a sensible picture. please run this for 72 hours and post the results here so we can have a further look into this for you.