Pfft. I hate that. "PC has the best controls" I've always called bullshit on that. Its like saying "Pros play on Inverted" Its a personal thing. If you can use a keyboard and mouse better then a controller, its the best option for you. I, however, can't. My fingers get lost on the keys too much. Instead of jamming the butt of my rifle into the dudes cheek I end up bonking him on the nose with a grenade, try to back up really quick but accidentally strafe to the right and hit the use key at the same time.
I'm hopeless with a keyboard, but I own on a controller. Thats just how I am. There is no superior choice.