Xbox WIFI Awful Since Update

My wi fi is so slow only two sometimes three bars when a week ago i had full strength

I'm having this issue now and reset didn't work. wired xbox one has 11 mbps upload, wireless has 1!!

Yeah, did all that, Xbox still has trouble getting signal. Its not the network because the Xbox One has been great up until this update. I see others with similar problems.

Did you have unusual weather? That can cause a lot of disturbance with Wi-Fi.

Disconnect all devices from the network, on the Xbox, Reset Alt Mac Addr once more, then when it turns on, delete the cache by holding the power button on the front of the console for ten seconds. Keep the console off. At the point the only network device
that should be on is the router, so if you look at the lights on the router, all should be solid. If one is flashing, then go play Hide and Seek with your wireless devices because something is still connected. After the lights are completely solid, pull the
cable out of the back of the router, keep it off for 5 minutes. After that turn the Router back on, wait 2 minutes, all lights should be back on and solid (If not, find the device that's connected) After that turn the Xbox on, and test the multiplayer connection
once more.

The update itself will not cause your speeds to drop, however, an update will cause you to get a new DHCP lease, which means it acts like the Xbox is a newly connected device. Some routers are set to give a "priority" device the majority of the speed, while
giving secondary devices a throttled amount to share equally. With routers like those, that's when you get this error. The Xbox was most likely a priority device, and when you did the update, it removed it from priority.

If these steps don't work, make sure you're wired and not wireless (As you will always get better speeds from a wired connection and will never ever get your fastest possible speeds using wireless because there is not a direct connection, its spread through
the room.