Who'd say he was the one behind all this? If any of these fleets managed to escape, then he'd get exposed. And even so, he didn't think a mighty force would care about him.
Even if any did, they'd think thrice before coming at him. He was in a very dangerous place, and he got a very formidable defensive shield. If any force wanted to teach him a lesson, they'd realise trying to do so involved tons of risks and dangers, even paying much more than what they already lost in his hands. And the end result was still questionable.
As for the cause of all these scenarios, he knew it was nearly impossible. The fleets coming out from the outer battlefield would need months to get back to their prime. And he'd not let a single ship escape from here.
If he couldn't take them under his wing, he'd prefer to kill them all, collect ships, loot from their inventories, and even bones.