After getting a$$ handed to them by Imperial Navy at SAVO
ISLAND
Lost 4 cruisers sunk (3 USN, 1 Australian)
https://en.wikipedia.org/wiki/Battle_of_Savo_Island
It appears that history wasn’t one of the stronger subjects for either of you.
After an air battle in which the Japs lost 36 planes to the American 19, and the Japs damaged one destroyer, Fletcher ran with his fleet the evening of August 8 - BEFORE the battle of Savo Island. Turner unloaded what he could, but after the battle at Savo Island (where the allied force was under British command, not American) he pulled the transports out about 24 hours after Fletcher. Of course, if the US Navy under Fletcher hadn’t already run, air patrols might have figured out that the Japs retreated after the battle, and the transports weren’t in immediate danger.
So, in short, Fletcher ran before, not after Savo; the sacrifice of the American and Australian sailors at Savo was not completely in vain, the American transports had time to finish unloading but withdrew because of inadequate intelligence as to the Strategic victory (if you know the difference between a tactical result and a strategic result) of the Allies at Savo, which can largely be laid to Fletcher, as well.
As for the losses at Savo, you might look at the role of John McCain in that. (Turner requested surveillance, McCain didn’t bother to order it.)