Christians disagree about who is the "I" in Romans 7. Is Paul referring to himself or others? What is your opinion? (We won't all agree here, but we'll learn what the issues are by taking and arguing for a position -- lovingly).
A few facts that I know are:
Paul was a murderer before he came to Christ
Paul ask God to remove the thorn in his flesh. God said no live with it. We don't know what this was in Paul's life that he wanted removed. Just maybe it was something in the mind like ****, that plegged him every hour of his life. If this was true he could be writing about himself.
I know I only grow in Christ in my trials, and this may have been true for Paul also.
It is not about what we struggle with, it is how we grow in Christ that matters.