His trump in vol 1 is from his knowledge of the most devastating disease in the history. His false flagging in comparison did nothing. Despite being heaped a ton of blame, **** all is done to Lapis by her superior so we could easily see that these things he did was pointless. Well, he now has his ****toy so that is that.
His victory in vol 2 is because they made a wrong assumption. Once again, the guy did nothing relevant to this, being handed the ****ing conclusion on a platter. He once again rely on his OOC knowledge to win. Let me reiterate: He did not win because he engineered or plotted or schemed, he did not even win because his opponent underestimate him, he won because he had the game knowledge.
Vol 3 is fully re****ed. He would be dead if not for that loli demon sending a note, and most of the character is retelling how he get another game character over and "win" by putting her to command. Discovering the loli demon was the one who sent the letter looked like an impressive feat until you realize she is the only person in high position who have a favorable opinion of the MC.