只怪心酸
[zhĭ guài xīn suān]
This username 'Only Blame the Bitterness' conveys a sentiment where the user feels that life's hardships and sorrows are to blame. The phrase implies that one cannot fault people or events, but rather their personal feelings and experiences of sadness are what shaped their outlook. This might be adopted by someone who wants to express their pain in a self-blaming context.