

On the charging map, I can see more than a dozen available fast charging stations (>=150 kW) in East Berlin. But I don’t know your exact situation and I believe you when you say it just doesn’t make sense for you.
From my experience, I can only say that I have never been in a situation where there was no fast charging option within 10 km when I needed it. I have also never encountered a situation where all the spaces at a charging station were occupied.

I have driven about 30,000 km in my electric car and charged it at over 50 different charging stations in Germany, Switzerland, Italy and the Netherlands. So far, I have not had a single technical problem that prevented me from charging.