I am going to be blunt because I know you respect it, but that is complete crap. I think you are referencing a sort of mix between vector and abstract, don't worry I tried one a while back and it was terrible. It looks really LQ, and the render just feels like it was pasted in as an after thought. The BG needs a lot of work, because to me it doesn't look cohesive it kind of looks like a texture stock overlayed with a watercolor image. Have you tried finding any tutorials on PR about these specific types.