I don’t understand why he wants to make him quit? Did garam do smth to him in the past?

he wants naeun to owe him a favor and thinks this is the best was to go about it

he knew that garam was naeun's rival and that her family has pull with the church orchestra he was part of, he wants her to re-instate the guy that he thinks was wrongfully dismissed because of the relationship they had (idk if it was grooming or just because it was a gay relationship and Christians do be Christian-ing)