"upload is freezing my internet on all other devices"
This is very typical for a standard type of router that doesn't do QoS on an asymmetric connection. Nothing wrong with that just that it isn't made to make sure to sustain good service for everybody else when one upload is hogging all bandwidth. Normally that is not a big deal but when you need to upload 100's of gigs it can be an issue. Routers that do QoS will ensure you other devices still get bandwidth even if one computer hogs the upload.
"You are wrong about Sky my upload is over 10mbs"
That's great. When I answered before I had taken a quick look at their website and didn't see any plans with an upload over 9.5 mbps. That seems to be the very fastest that they offer in their special max package: "Sky Fibre Unlimited Plus – with download speeds of up to 52Mbps and upload speeds of up to 9.5Mbps.". Their normal plans are only 1.3 Mbps upload. This is the first link that comes up when I google sky fibre. Your provider could be a totally different Sky as that is a rather generic name of course.