Ping went from an average of 55-60 to 150-155 around a month ago. This was discussed at length in this thread: https://forum.square-enix.com/ffxiv/...45-Ping-of-200

Like most people who posted on that thread, I am from Portugal and I am having the same issues. At this point I'm mostly making this thread in a desperate attempt to raise awareness because I'm almost certain that there is some shady reason such as fixing the problem costing more money than just letting a bunch of people have an immensely worsened experience.

A back-and-forth with support that lasted 2 weeks ended with the last message I received saying that they can't do anything about it, despite being the only ones that can do something about it. More details about the issue in the thread mentioned above and the general consensus appears to be that this issue is permanent unless SE does something.