(For the record, I take Maths, Media, and Biology)
I think science/maths students apply the wrong standards of difficulty to creative subjects. Neither the content nor the exam is difficult to do in the same manner that you may not understand a maths question.
However, being good at a creative subject requires dedication. Coursework can take up a good few months, and media's only 50% coursework. There's no clear syllabus where you can definitely confirm that you know everything, you just have to learn a lot and hope. Also, I personally found A2 media tricky as I learnt half-way through the year that my essay skills are approximately 0, and it took a lot of practice to get them up to speed.
In science/maths, you can typically learn the exams via past papers and knowing the spec, but media you can't. It's more about having certain skills, which aren't necessarily well defined.
I'm not about to say media's the hardest subject, and honestly if you have an awareness of the world around you then you'll probably scrape a C in the AS exam. But the difficulties when you're aiming for top grades is different to science/maths, and you can't really make a direct comparison between the two.