Some people correct others joyfully, but some people when they rebuke, it breaks them up inside, because they do not want to do harm, but good. Which attitude do you think Paul had?
“For out of much affliction and anguish of heart I wrote to you, with many tears, not that you should be grieved, but that you might know the love which I have so abundantly for you” (2 Corinthians 2:4).
Paul refers to what he wrote in First Corinthians 5. He rebuked them sharply for their boastful acceptance of a fornicating member of the church. They repented of that and put away the sinning member. They grieved deeply over their lack of a godly attitude and that got to Paul, knowing that his letter had in a sense hurt them, but he was also glad that it moved them to repentance.
He took no joy in rebuking others, but knew that it had to be done.