Complex sentence: What irony! Further delays ensued due to the stadium's unusual design and Taillibert was not willing to back down from his original vision of the stadium even in the face of escalating costs for raw materials.
Split into simpler sentences: What irony! Further delays ensued due to the stadium's unusual design. Additionally, Taillibert was not willing to back down from his original vision of the stadium even in the face of escalating costs for raw materials.