What do you think is wrong with his script?
I would simply say it looks messy. Clumsy and crappy sound like deliberate insults.
Well, it is legible. It refers to the handwriting, not the individual words and letters.
What about Mr. Schwarzenegger's script is not nimble and energetic?
What would make you say someone's script is nimble and energetic?
I find it an odd way to describe handwriting so I'd like to know how you made the judgments you did.
Well, your question was who said it, not that you found it disagreeable.
Okay, but don't you sometimes take a question at face value and ask what was asked?