In nearly every area the network has been updated multiple times, upgrades even to the old HFC network are ongoing, and they're overbuilding the whole thing with FTTP.
Other than that couldn't agree more.
OP: severe congestion issue that VM should have sorted way before it got that bad. They should be sorting it: when the team get to reply they should be able to advise on timescales.
A BQM like that isn't the inherent flaws with anything: you have a fault that should be fixed. A Hub 5 may actually help a bit if you are on a Hub 3 right now.