Command failures fall on the admiral no matter who advised them.

Evidence

Abandoning the Rosario was his first real failure, and he knew that whoever advised it and however wise had been the advice his would be the blame. Perhaps it was only then he remembered that Diego Flores de Valdés and Pedro de Valdés were not only cousins but inveterate and implacable enemies. — Garrett Mattingly, The Defeat of the Spanish Armada, 645

Categorization

• XREF: Echoes the personal-faction dynamics seen elsewhere in the chapter between rival captains; connects to modern leadership-accountability literature.
• corroborated: 2 independent passages support this claim — Garrett Mattingly, The Defeat of the Spanish Armada, 645