Save your money. Gaming routers are just normal routers with a jazzy paint job and thirty quid uplift on the price. And as an over-utilisation problem is between the cable modem side of the hub and the CMTS gear at the head of the local coax network, you can buy any router you want and it won't make a blind bit of difference.
At the moment the only likely fix is to wait for lockdown to end, there's nothing VM will do to fix a problem they hope to be temporary.
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