Are Frankufrt servers overpopulated?

I also noticed the huge lags in the last few days. Note: I always play on Frankfurt which is really close to me therefore I have only a ping of 20-30 at the evening, not in the afternoon!
But I do wonder why the lags are getting worse now even tho the last few season were quite the same and normal at the same time.

I also played with friends who are based in USA but I couldn't even play normal because the lags are so bad that everyone is teleporting and I was getting dowsn within secs even before I knew what happenend.