Slow Wi-Fi Speeds... Shouldn't Videotron provide DFS-enabled routers where required?

On the 5GHz band, I'm looking at speeds of around 5Mbps (less on the 2.4GHz band) on a 120Mbps connection when I'm less than 10m away from my router. But with so many networks in my area running on the same frequency bands... I'm not surprised. I would really like to see Videotron provide routers with DFS support in areas where they are required to provide effective service. You really can't call these routers "Cutting Edge" if I have no choice but to buy a new router with DFS support to provide effective WiFi coverage for my home.