无数绝望造就堕落无数心痛练就无情
[wú shù jué wàng zào jiù duò luò wú shù xīn tòng liàn jiù wú qíng]
This username implies that the user has gone through countless episodes of hopelessness and heartache, leading to a fall into despair and a cultivated apathy towards emotions. The sentiment conveys a feeling of being hardened and emotionally detached as a defense against further pain.