Bought a AX3000 a few weeks ago.  For some reason any Wifi device has bad upload speeds.  I have Frontier FIOS 500/500.  Even with my Wifi 6 laptop sitting 1 foot from the router I typically can only achieve 500/250 on speedtest net.  If I plug my laptop into my dock (which connects it to ethernet), my speed is the normal 500/500.  I have tried different channels (including DFS), different channel widths, and different devices and the result is still the same.

I tried the advice on this page: 

https://community.tp-link.com/en/home/forum/topic/269726

That made no difference.  Can anyone help?