What causes break up in youth's marriage?

Due to peer pressure😏😏😏, youths enter marriage for the sake of shaming friends🙆🙆 but their commitment only ended in breaking up in such a short period of time🥺🥺,is it they are more likely to break up due to lack of communication or is it because they are not patient with each other🤷🤷🤷prior marriage is full of challenges 💁💁💁. Actually what causes break up💔💔 in youth's marriage?