Sorry should have specified in my first post, it is the same result with the hub as a router and a modem. We have had (albeit briefly) our full speed through the Archer router on a couple of occasions.
Can you post your Hub status and logs? Someone should be spot if there is a problem Navigate to http://192.168.0.1 (or http://192.168.100.1 - if in modem mode) Don't log in! Click on 'router status' Copy/paste the data from each of the tabs. The forum software will remove the MAC addresses for you (you may need to click the 'post' button again).
Also, set up a 'Broadband Quality Monitor'. This will monitor the state of your connection and record any network dropouts etc - You can do this at ThinkBroadband (https://www.thinkbroadband.com/broadband/monitoring/quality) Give it a while to gather data and then click 'Share Live graph' and paste the 'Direct Link' into the forum!
If they are still low – boot you device into windows safe+networking mode to disable any potentially interfering software - and try again.
There are many posts on here where QoS software (is you Asus running that?), unknown/flaky software, old network card drivers, corrupted browsers, bad cables or other connected devices are limiting speeds on tests.
Report back what that gets.
-------------------- John --------------------
I do not work for VM. My services: HD TV on VIP (+ Sky Sports & Movies & BT sport), x3 V6 boxes (1 wired 2 WiFi,) SH2 in modem mode with Airport Extreme Router +2 Airport Express's. On VIVID200, Talk Anytime Phone, x2 Mobile SIM only iPhones.
Have you got an attenuator fitted anywhere? Your downstream levels seem a bit low for what your upstream levels are, also DS SNR is at 35 which isnt much higher than the 34 lower limit. If there is a Forward path attenuator try removing it and make sure all connections are clean and tight
I work for Virgin Media - but all opinions posted here are my own