What reason to reject this flyer Item? what is quality standard?

medical-flyer-Green I want to learn from my mistake. Please any expert give your valuable feedback.

this is globally rather clean but the thing is that the choice for colors is definitely a good one … not only is it failing to match with codes of the activity but this is also not harmonious visually speaking too , besides, this is not matching with the global atmosphere generated by the pictures u used … i do not understand what is the point with the central black shape otherwise … and why repeating medical services there … also pls use contrasting colors for the circles of the icons because at this stage your icon symbols are not popping out at all