I don't. Some teachers got worked up about my handwriting just last week, but because it's very narrow not because it's sloppy, even though they say it's sloppy. But it's not, because all letters look pretty much the same, they're just narrow and my writing is left-bound which people usually don't like at all for subconscious reasons.
But...
People with AS can have sloppy handwriting because of motor issues, just like everyone else with fine motor issues and maybe another reason why someone with AS can have sloppy handwriting is because of sensory issues? The latter is a guess, but the first it pretty much fact. There may be other reasons to have sloppy handwriting.
Something funny that may apply too:
Many NT males have worse handwriting than NT females and since more males are diagnosed with AS, more diagnosed people with AS may have sloppy handwriting.