Complex sentence: After being created and trained however he was found somewhat inferior to the future 47 (he did not possess any significantly superior strength nor endurance) and was regarded as a failure by Ort-Meyer and confined within the depths of the sanitarium.
Split into simpler sentences: After being created and trained however, he was found somewhat inferior to the future 47 as he did not possess any significantly superior strength nor endurance. He was regarded as a failure by Ort-Meyer and confined within the depths of the sanitarium.