I dont think Robin cant get "up close and personal" against other characters, however he does need momentum and a clear reason to do so. I am not afraid to slap my opponents in the face when I see the chance to do so, and I sure take my chances to gimp people once they are out of the platform with a nasty USair or FSair, heck, even a Nair.
However dont ask people to get intimate with the likes of Lil Mac, bowser and even way quicker characters than him. We might as well comit SD. Robin needs room to do her stuff, charge tomes, zone arc-fires and get cozy to try some LevinSword aerials.
And also, please dont come here telling us how to play... for startes you are generalizing EVERYONE plays the same way and from that alone you are already paying it with the kind of respnses you get. As said, Robin is a zoning character with the perfect tools to do so, dont ask us to adjust our strategies for you. Anyways, everyone has their own play style, so most likely you have been just terribly unlucky as to get the same kind of robin all over again and again.
Who knows... the moment you find a Robin that gives you what you want you might actually regret it. Robin can be quite a force to be reckoned with when given his preffered spacing. I sure am.