Unbearable Server Lag

The game is unplayable when using the Brazil-Sao Paulo server from 11am (BRT) to around 6pm (BRT) due to lag spikes every 2 seconds or so. I have seen similar complaints on Reddit from players in the PC using the same Server.

EDIT:
There is already a bigger thread addressing this:
https://www.pathofexile.com/forum/view-thread/3597548/page/1