Server stability issues

Just like PoE 1, during heavy server load the game becomes unplayable due to server stability issues and ping spikes.
Happens late afternoon / early evening EU hours for the first 1-2 weeks of league launch (or in this case, PoE 2 launch). As player numbers start dropping the issue disappears. No other game or service ever does this, or has ever done this before. My PC and internet are stable, game is running smoothly FPS-wise.
Thousands of people reported it for PoE 1, hundreds are reporting it for PoE 2 as well.