First up to say it tasted like chicken
You win.
“Long pork”
Human meat tastes most like pork. That is why they call it “Long Pig” in the region.
Cannibalism is not as far from normal in SE Asia, as it is in the West. Even though it is a taboo, it is not so unthinkable. Societal attitudes tend more toward allowing/understanding resorting to cannibalism in extreme difficulty.
I had a heart to heart conversation with a Thai Army Captain in the 80’s over a bottle of Mekong whiskey, who discussed the hardships of warfare, isolated in the jungle. He emphasized that you absolutely had to be firm against any cannibalism of your combat dead - only the enemy. He confirmed the pork-like flavor.