Absurdly extreme lag

When submitting a bug report, please use the below template and thoroughly fill out the necessary information.

Date & Time: Ongoing since circa 2017
Frequency: Always
World name: All, both EU and US datacenters. Most tests done on Balmung and Faerie, but results are the same.
Character name: Usul Omins
Retainer name: N/A
NPC name: N/A
Monster name: N/A
Class/Level: Irrelevant
Party or solo: All party content
In-game time: Always
Area and coordinates: All except inn rooms
Housing: N/A
Steps: Extensive troubleshooting with instructions provided by the support team. Too long to list here. Please see tech support ticket t8484236:cbc7


Connection Specs
- Type of internet connection/provider: Fiber
- Modem maker/model number: Irrelevant, issue has been taking place regardless of provider or network hardware.

■ PC Specs

Information was already provided to the support team as per ticket t8484236:cbc7

The rest of the relevant details can also be found here:
http://forum.square-enix.com/ffxiv/t...18#post4722218

TL;DR, I'm getting absurdly high latency (3-4 digits just standing in town doing nothing, 4-5 in any kind of instanced content whatsoever. The only place that seems to be free from this is the inn rooms. This issue has been ongoing for over a year now, and has followed me even after moving almost 3000 km to a different country, with a different ISP and different network hardware. The router is different, the cable is different, and so is the network adapter as the motherboard needed to be replaced earlier this year.

No other online games do this, and I can download fairly large files in seconds. This issue affects me regardless of which datacenter I try to connect to and the very extensive list of troubleshooting measures provided by the support team have had no discernible effect. I have consulted other players and the consensus is that there are known and egregious routing issues to the game servers but no action has been taken in that area. I need solutions, otherwise I will just have to quit the game. I don't want to spend most of my playtime frustrated about being unable to dodge all the area of effect crap bosses throw around, and even if my computer were a potato, these lag values are absolutely ludicrous.