As I have seen you apply before, I think you should really look into the feedback they give you, and make sure you are what they're looking for. Your spirit is in the right place, with your goal being helping people. However, being confident is also important, so never doubt that you'd be a good staff. I believe if you look into feedback, and really show that you want to help, while also putting in effort in the server and being active in the Discord server and on the forums, you'd be a great staff. I also recommend (if you haven't), to try being staff on a smaller server first, to see how things work and what is expected of you.
Good luck if you re-apply in the future!