毕竟我爱的他不如大姨妈
[bì jìng wŏ ài de tā bù rú dà yí mā]
In a dramatic or sardonic fashion, this compares loving someone to having menstrual visits, which could mean 'After All, He Is No Comparison to Auntie Flow,' expressing frustration towards someone who isn't meeting one's expectations or needs.