The phrase ‘add fuel to the fire‘ means when you do or say something that makes a miserable situation even worse. ‘Adding fuel to the fire’ means to make a situation or conflict intensify, especially via provocative comments.
Example of use: “I had plenty to say about the situation, but I was afraid I would add fuel to the fire. So I kept my mouth shut”
‘“John only added fuel to the fire when he accused the other team of cheating.”