High latency after EndWalker release.

Hey, for the past few months I have had high latency in FFXIV. I tried talking both with Square Enix and my ISP but both put fault on each other, so I don't know where else to go. My latency was never bad before EndWalker it just started being out of nowhere.
I play on Chaos and live in Portugal, I also have the same high latency on Light.
One thing of note, I have two other friends with both different ISPs than me and they also have these latency issues.
From what Square Enix told me is that I am having a lot of packet loss, and my ISP told me that I am connecting to a server in Japan and that's the problem.
Hope someone can help me.