Have you split your WIFI bands, ie the 2.4GHz and 5GHz range.
5GHz is faster, but does not cover as much area.
Make your SSID to have 2 names VMxxxxxx for 2.4GHz, and VMxxxxx_5G for the 5GHz.
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Red (VM SH2 AC Beta tester)
Running on 1Gbps VM service with SH4 in Modem Mode, with a ASUS GT-AX6000 router. With this setup I get Fantastic WIRED and WIRELESS Signals in my home. I dont work for VM. But I work in IT, and I know my tech.
My advice is at your own risk. If you are happy with my answers please press Kudo ?