Here is the item again:
Although you might not believe it, Antonio actually benefits from his chicken
scratch handwriting because no one can read
it, Antonio does not worry about word choice or spelling.
Antonio actually benefits from his chicken scratch handwriting is a complete sentence. Because no one can read it, Antonio does not worry ... is a second complete sentence. Because only blank space exists between handwriting and because, a fused sentence results.
To fix this problem, you could put a period after handwriting and capitalize the B in because.