| FFM is a massive airport and very hard to get around. To its defense I must say, that this airport is old and had many buildings added on over the years/decades. However, there are things that do not have to be as they are. In particular turn over times are very slow. Although they claim to have a 45 minute turnover time for transits, this could not be further away from the truth. Even with turnover times of 1h30min I was still running down corridors and up and down stairs, whenever I traveled through Frankfurt. The last time, in Sept 2019 despite immediately leaving the plane and following the signs I was stuck in a long queue of passengers, waiting for security. Both business class and economy were the same single queue. I had planned a 1h45min turn over, learning from my past experiences. Being stuck I saw the time running out, so I left the queue and talked to some idly standing security officers. They only shrugged, commenting, that I had checked in too late - this was a transit, and therefore beyond my control! After 15 min - I already had given up hope to ever reach my domestic flight on time - another officer appeared and guided us to a different security area, with 2 (two!) open lanes. At the last minute I reached the gate. This is extra stress being added to an already exhausting international trip. Middle Eastern, Asian and Australian airports are way ahead. I could not give comments about airport shopping and wifi, all I could do was rushing through the airport - no time for shopping, sorry guys. Conclusion: Big airport with long distances. Poorly organised and slow security. Unhelpful staff. Services falling behind international standards. I will avoid Frankfurt whenever I can.