Taking a closer look at the previous pictures, the apartment appears to be pre-1990, in which case the outlet in the living room is in fact the AOP. This is confirmed by the meter cupboard pictures.
The weak downstream power (should be at least -3.5 dBmV) and noise ingress require further investigation by a technician. I suspect a cable problem (i.e. damage) outside the apartment. A new AOP (btv 01-SET/UPC) should be installed as well.
A moderator (Ziggo employee) can schedule a technician appointment and will visit this topic within 1-2 days.