there are 2 versions of "optcal fiber" in greece, one is the newset one "fiber to the wall" where the company will replace your old copper wiring with an actual optical fiber cable, they will also provide you with better equipment and then there is the "optical fiber up to the entrance of your house/building w.e", where copper wiring is included and that makes it really hard for data conversion. I am web developer not a network engineer so I might not be fully aware of this but you can compare the 2nd version to a highway road going from 4 lanes to 1, the 4 lanes are the optical fiber, where 1 is your old copper wiring. This creates a bottleneck for the data/game packets and creates the disconnects.
I am from greece and I can tell you that 99% of the times it is the ISP or some issue casued by the old infrastructure we have in greece.
p.s. I have not had a single disconnect so far.
p.s.2. I have 100mbps fiber to the wall.
p.s.3. I know most if you don't care, but these comments are funny AF...
p.s.4. stop asking for compensation for everything that happens ingame
Lastly, do not forget that all companies use VoIP nowadays which makes it even harder to detect anomalies that would affect you, for those that are not fully aware, the took the old regular telecommunication lines which were 1:1 line per house, and divided them to VoIP which was 1:5 1 line for 5 houses. This division is also something that can be a factor in your disconnects, the reason behing it is rather simple, lets say that each phone line can be divided into 5 VoIP numbers/connections, we are in Greece, in the name of profit they are split into 10 VoIP numbers/connections instead.
I know most of you want to believe that it is NCsofts problem and up to some point it could be, but for those who are located in Greece, we have no infrastructure to support fast internet connections. About 2 years ago the Phone companies got EU funding for fast internet, which means that you can get a proper intenrnet connection with good and stable speed, you can check with your zipcode and address in sfbb.gr (stands for superfast broadband).
Thank me or do not thank me, here are the facts!