Hey! Thanks so much for your message; I've just gotten back to you! Please let me know if you've got any more questions or anything you'd like for me to clear up.
Try to focus on what kind of feedback you get - is it because of your structure? Usually a lot of my students lose marks because their ideas and analysis are quite strong but aren't developed/structured properly. A cohesive piece that flows well is a good chunk of your mark. Or is it the other way round - is it your content? Do they not like your ideas or do the markers feel they aren't backed up or explained well?