Realism is kinda like people seeing the world the way it really is, such as rich people use their money and rich person status to get what they want, and not rich people work their asses off for the stuff they want, like being a "realist". Romanticism is like people seeing the world the way they wish it was, like extraordinary things happening to regular, underdog people that send them on an adventure to do something great, or a noble prince coming to save a damsel in distress. A lot of people use romanticism to escape from reality cause tbh the world isnt that great. Hope this helps.