网名终究败给了备注
[wăng míng zhōng jiū bài jĭ le bèi zhù]
This is a metaphorical sentence expressing the defeat of one's self-imagined identity (nickname on social media platform) by real facts (notes or personal details you have written for someone in your mobile phone or computer). Thus, its meaning could refer to disappointment when reality falls short of expectations, revealing the distance between dreams and actuality.