菇凉人美脾气好没人爱
[gū liáng rén mĕi pí qì hăo méi rén ài]
It describes a girl (represented by the playful character '菇凉' for 'girl') who is beautiful and has a pleasant personality but feels unloved. The user might feel undeserving of love despite having positive attributes and may be venting about the frustration.