i just know this hurt Eunyung more than we're led to believe. he was absolutely convinced he was right seeing how quickly he agreed to the bet. him being wrong about a person's true intentions/ulterior motives must've stung bc 1) he's typically good at reading people so this is him basically failing at one of the 'few good skills' he has and 2) bc Haejoon's uncle being a decent upstanding person proves that good people do exist, Eunyung just never had the privilege of meeting them.