USS McCain troubled history

Seventh Fleet had a history of sloppy operations in Asia early in Trump administration. Why couldn't these sailors handle their boats? Was the training that bad?

January 2017 to August 2017: Four collisions accidents in Asia

August 2017: New leadership installed. Sailors went 'missing' from the USS McCain.

Vice Adm. Joseph P. Aucoin removed.

Rear Adm. Phil Sawyer installed.

Who is keeping the USS McCain in the headlines and why?

Sauce: https://www.nytimes.com/2017/08/22/world/asia/us-navy-ship-collision-uss-mccain-search-sailors.html