your work looks great but need some modification ,
1- try change the color of image preview background "bink color " to another proffisional color like black, white or grey
2- check your typography on all slides
3- try to arrange your slides in preview image in sections ( introduction - about us -team - infographic - etc… )
4- watch best seller projects as much as you can to inspire yourself .
I think that your template power ponit is hard rejected because problem typography, problem padding/margin and colors see bad, you need better template power point for approved graphicricer good luck regards.