The low download speed is almost 100% certainly caused by 4G/5G ingress interference.
While the modem is directly connected to the AOP/main outlet, could you post the modem’s downstream/upstream data according to these instructions?
The AOP is highly outdated and must be replaced by a technician (free of charge).
If you would like to utilize the cable which runs along the wall, a new connector must be installed on the modem side. The existing connector (or rather the remains of it) is unsuitable for digital TV or internet because the cable is incorrectly terminated and the connector is completely unshielded and severely outdated. The connector on the outlet side is slightly outdated but should still suffice, provided the cable is properly terminated. The technician can install a new cable or install new connectors on the existing cable, as required.
A moderator (Ziggo employee) can schedule a technician appointment and will visit this topic within 1-2 days.
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