Just had a thought triggered by recalling the period of time when I had a fault.
1) The Sat and Sunday visits were originally as a result of a botched contractor installation who made a total mess of my internal wiring.*
Its since that time that you see a heck of a lot more complaints about Openreach engineers and how useless they were. Here on these forums we know about Quinn and Kelly contractors, yet often they arrive in vans which have an Openreach sticker and in smaller letters something like 'Working on behalf of'. Are the general public aware that these weren't true Openreach engineers. During the same period Openreach also took on ex-Service personal.
One of the visits I had was an ex-marine and was actually quite rude and belittling when I tried to explain my fault. He refused to do a TDR test. One of the things he saw when connecting he JSDU was lots and lots of CRCs. We actually got into a bit of a debate over his statement "
They dont matter because they carry data which they can recover form.. and Im not getting FECs which indicate more of a problem" - Bear in line this line wasnt interleaved so there wouldnt be any FECs. I complained about his rudeness and insistence that he was correct.
My point here being, not all OR engineers are perfect, but the use of contractors and ex service personal will not have helped public facing perception of Openreach. There is no doubt complaints rose during this period.
2) VDSL is far less tolerant of HR type faults which are hard to track down.
Im not aware of any statistics anywhere, but from what we see on the forums, because vdsl pushes the line more then there are more faults reported since fttc than when just adsl.
Some of these faults are very hard to resolve. Should Openreach engineers be far more aware of the effects of SNRm, CRCs etc. The lack of decent modem stats on the equipment supplied to the EU equipment doesnt help much either.
*It should be noted that I started with what initially looked like some sort of EMI fault at the same time that I had ordered FTTC. I was not going to delay the FTTC installation and migration if there could be a chance that it may sort during the process. As it turned out perhaps I should have got it fixed first via BE* because the fault was much easier to see and far more service disruptive when on an adsl2+ with a 3dB SNRm than on fttc with 12db of surplus SNRM ----------
ETA
Also years ago in my adsl days when openreach were not so bad.
Our posts crossed, but having just seen yours, it fits quite nicely with what I just typed.
So why has Openreach got worse since fttc? Could the 2 points above not be helping?