Complex sentence: Although "Wuthering Heights" is now considered a classic of English literature, it received mixed reviews when it was first published, and was controversial, mainly because of its stark depiction of mental and physical cruelty.
Split into simpler sentences: Although "Wuthering Heights" is now considered a classic of English literature, it received mixed reviews when it was first published. It and was considered controversial, mainly because of its stark depiction of mental and physical cruelty.