Virgin Media since September 2017

I've had significant trouble with online gaming since Sept 2017 I've detailed the issue here http://community.virginmedia.com/t5/Gaming-Support/U...

Since then I've had several engineers round and technical support suggested it was high peak usage that gave me latency problems. I've had both superhub 2 and 3 and the same issue with both. Eventually they thought the issue wasn't so much the high utilisation in the area but a SNR issue on the upload which they thought was a faulty power adaptor on the local large green box in the street (UBR?). This was "fixed" on Wed 10/1/18. THe high utilisation involves digging up streets and supplying more capacity which isn't due until 27th June 2018 !
Since then I still have the same issue. A ping that goes up causing latency issues in game on wired connection when the school kids come home and at peak times. Other times there isn't much problem but the ping isn't stable but I don't get the big latency issues.
The BQM from last Sunday before the fix is here https://www.thinkbroadband.com/broadband/monitoring/...

The BQM graph yesterday after the "fix" is https://www.thinkbroadband.com/broadband/monitoring/...

I don't if I should expect a graph like the one listed here https://www.thinkbroadband.com/faq/broadband-quality... under What should I see if my connection is idle and running well? or if that's only if at it's peak but mine always has yellow spikes indicating high latency.

I'm at the point of switching to say Sky but I'd rather keep the fast download (which is unaffected) if I can.

Any thoughts?

Very rare for cable to get as clean as our example, you would still still some yellow jitter but a LOT less than what you have now