The nature of a support forum is that it tends to attract customers who have got a problem of some description. There are not that many topics which are posted on here to heap praise on VM for a job well done.
Some of the regulars on here report that they hardly ever have issues with their VM connection. My own past experience with VM was that it was mostly fine but occasionally slow for no particularly obvious reason, often the problems were temporary and went away on their own.
Much might depend on the particular area a customer is located. A customer connected to 20+ year old infrastructure from a former cable TV company may have a worse experience than one connected to some of VM's newest areas.
That said, I have been using a BT FTTP connection for the past couple of years and it has been faultless. So if you are considering a move from VM, and you have some other highspeed options available, they might be worth a look. (Your other recent topic ref speed suggests you may have a connection problem of some sort)