经历许多事看清许多狗
[jīng lì xŭ duō shì kàn qīng xŭ duō gŏu]
Literally translates to 'Been through so much, seen many dogs clearly.' In Chinese slang on the internet, 'dogs' sometimes are metaphorical references to human beings. It might mean the author has gone through plenty experiences and now sees those disloyal people in their true colors.