......
ti egine kai xathikan oi taxitites den mporw na katalavw.
But that is how cable technology works. The bandwidth on the last mile (the coaxial not fiber cable)
has to be shared. If you live in a neighborhood that has only one customer then probably you can get full bandwidth. But if there are many customers on the same line then they have to share the bandwidth. This is mostly seen at Apartment buildings where if you have 2-3 "powers users" downloading with 10Mbps each for 24/7, then the rest of the customers will get lower speeds.
If it is easy to fix it why Cablenet hasn't fix it so far since they have a problem for the last 3-4 months.
If it is difficult , it probably cost a lot of money or they don't know how to fix it.
If it cannot be fixed then this is the wrong broadband technology.
With DSL technology, bandwidth on the last mile is limited only with the distance of the copper line and the technology you have.
The problem with distance can be fixed by placing DSLAMs closer to customers (cabinetisation). There is Fiber-To-The-Cabinet thus making copper line shorter. CYTA and perhaps others already do this.
DSL Technology is now ADSL2+ and goes up to 24Mbps. Next best technology is VDSL2 and goes up to 200Mbps (100 Mbit/s at 0.5 km and 50 Mbit/s at 1 km) - but we don't have it in Cyprus

Sharing starts from the Provider and depends on the policy and international capacity the ISP has.