Heathcliff is the original man who will do *literally* anything else except go to therapy.
Use children as pawns in a Xanatos gambit to snatch up land just to make the people he sees as slighting him miserable? Yep. Abuse a dog to demonstrate control? Yep.
Why does this get sold as "the greatest love story" again? Like greatest petty revenge story, yes. Love story? Eh. There are love stories here but they're so not the point.