Never heard of him before, but from your link it seems he saw a lot of action during the war as a Junior Officer.
Nothing in that indicates to me he was incompetent and it does not appear that Lincoln made him an Admiral or was even aware that the guy existed. He didn't reach flag rank until many years after the war.
I talked to Ed Bearss about him over supper one night.
Selfridge had a history of sinking boats....especially those that begin with a "C".