whilst inconvenient, it would be useful to check if you get the same issues whilst connected to the hub via ethernet to see if the problems persist over a cable.. it will help narrow down where the issue is..
ok - can you set up a BQM please - then have a look at the "Live Graph" and underneath, select the "create sharing link" (or similar) post that link back here.
in addition, browse to you hub on http://192.168.0.1 - don't log in, click on Router Status. Copy and paste the tables from Upstream, Downstream and Network Log back into this thread - one post per tab (it won't all fit into a single post).
so you need to select teh whole table on the downstream tab (and network log) you need to scroll down the screen to select the full table..
That aside, there's a more obvious problem in the upstream - three out of four of your channels are at 16QAM and should be at 64 - this will almost certainly be impacting your performance.
Setting up the BQM isn't would be really helpful.. Follow the link i posted above and click Create New Monitor (you will have to register for an account before it will let you do this) it should automatically populate the "difficult" information (i.e. your IP address etc..) so just give it a name (whatever you like) and then:
(I'm gonna steal @MikeRobbo's instructions for doing so - see below..)
Instructions for posting BQM Link
Under your BQM graph are two links in red.
Click the lower link (Share Live Graph) then click generate.
Copy the text in the Direct Link box, beware, there may be more text than you can see.
On here click the Link icon (2 links chain to the left of the camera icon)
In the URL box paste the link you copied and in the ‘text to display’ box write My BQM then click OK - you can post the link straight away.