I also tried gen fill and got similar crappy results. I believe Kay Cee's work was not gen fill, she uses a 3D program, probably Blender. The glasses are 3D and the program renders the image with the bottles in the background, that's how you get those beautiful glass distortions and lighting.
Yeah, I hadn't thought about a 3D program. I do believe Adobe's Gen Fill is much more capable and will phase in much stronger in the future. But at the moment I feel like Adobe scrambles labels and facial recognition to avoid legal complication.