Yes I was shocked at this too. Even the flagship Madrid Barcelona line only has 1 train per hour.
This seems ridiculously low given HS2 in the UK is planned to have 18tph on the core line (to various destinations, but still).
To make matters worse the spainish high speed lines have mandatory reservations so once the train has sold out you are not allowed to board - unlike the UK where you can still board but may have to stand for some of the journey - which is not ideal but at least you don't have to stand around for another hour waiting for the next train anyway.
This seems ridiculously low given HS2 in the UK is planned to have 18tph on the core line (to various destinations, but still).
To make matters worse the spainish high speed lines have mandatory reservations so once the train has sold out you are not allowed to board - unlike the UK where you can still board but may have to stand for some of the journey - which is not ideal but at least you don't have to stand around for another hour waiting for the next train anyway.