You reached the airport 'one hour' before your flight...

I think this is where your problem lies. You should've been in the airport at least two hours before your flight (if you booked economy class) and an hour and a half if business class. 

Boarding time is normally one hour before the flight. Im sorry that you didnt board the plane, but with the details you have given here, I think it is your mistake. 

My husband and I usually come to the airport 3 hours before our flight, to avoid the rush and the crowd. 

I hope you will not look at this situation at your side only.