I don't see how you could think Guardiola let him down, last couple of Pellegrini seasons there were questions about his work rate and every other post on here was in reference to a bad ankle that was hindering his performance. Pep walks in the door and all that disappears, he was our most consistent player for two and a half seasons and took his game to a new level. If anything the manager showed too much reverence for Silva this season with staring him 2/3 times a week or playing in very intense games to the detriment of the team. Silva had plenty of chances in the champions league but never managed to show his best level there, same as Nasri, Kompany, Aguero