Thanks for contacting us. I’m sorry the network performance is poor when using the dock. I’d be happy to help!
Just to confirm, the poor performance is when using the wired Ethernet port on the dock itself, correct? Assuming that is the case, the first thing to check if you haven’t already is the cable itself. If you have another Ethernet cable available can you swap it in temporarily just as a test to see if the performance is better?
Let us know the results when you have a moment and we’ll go from there.