Wish I still had hair to pull out. There's some, but I'd need forceps.I'm starting to pull my Hair out, lol.
At this point, I'd start looking elsewhere, for example, the Router.
The ASUS AC-3100 has known Issues, just google "ASUS AC-3100 Speed Issues".
Perhaps the Firmware on the Router could be updated. I'm not a big Fan of Asus, I admit.
I sold hundreds of TP-Link Routers and the are fast, reliable, almost bullet-proof. They don't cost an Arm and a Leg and you could always return the Router if you keep the Box.
What say you?
Worth a try?
The Asus replaced a Nighthawk which did work rather well. The Asus was free, so I figured I'd give it a shot. I can always swap the Nighthawk back in and try that. I'm obsessive about keeping things up to date and probably check the firmware a couple times a month. (That was the mistake with the Intel WiFi card.. I let Intel install the latest driver, which wrecked everything. Rolling back a version fixed all but the file transfer across the network).
Not knowing routers as intimate as I do video equipment, I'd think on the surface a problem with the router would affect more than just one computer.
I DO like the Asus' ability to run a VPN. Though I currently have that disabled.
I like the Netgear's dual 5Ghz radios. Allowed me to split phones and computers between the two, with all the usual "smart" lights, thermostats and so forth living on the 2.4Ghz band as it is with the Asus.
I may try the TP-Link. Amusingly, I might still have a couple of those in a box, somewhere, though nothing current.