Super hub 5 modem mode crashing

Would another visit by an engineer fix it? I somehow doubt it as I suspect the issue isn’t at my end. I canceled the appointment due to the fact another engineer was fixing some tv issue in my road that day and I hoped that would sort it. It didn’t, some days the pixelation isn’t too bad, others like today it’s completely unwatchable. Get an engineer to check the box in the road maybe! But I won’t sit around waiting hours during the day to have an engineer tell me what I already suspect. 2 new 360 boxes, new router, cables and connections checked by virgin media’s engineer(s) and still a rubbish pixelated picture on all channels, worse on the U channels, u&dave etc.

Also we can safely assume that because both boxes have bad pixelation, that the problem must exist outside of the boxes and at a point where both can be affected, this leads us outside the house and to the box on the wall where the coaxial cable is split into 3 separate cables, 2 for the 360 boxes, 1 for the router, and each in separate rooms. So at minimum the problem exists at the point of the box on the outside wall -> where the signal sent through the cable originates.

also this post was mainly about the router that kept dying and not about the pixelation, so the other post would have been the better place. But who am I, just the bill payer! I’d expect compensation but it’s virgin so let’s laugh that one away.

p.s. I’m autistic, if the tone of what I write sounds off, it’s not it’s just I struggle with language.