自怨自艾

nǐ zì yuàn zì yì méi yǒu yòng zhè dōu shì nǐ zì jǐ de guò cuò

你自怨自艾没有用，这都是你自己的过错。

It's no good feeling sorry for yourself. It's all your own fault.

zì yuàn zì yì yī diǎn yòng dōu méi yǒu

自怨自艾一点用都没有！

Moping won't do any good!