众口难调

yáng gāo suī měi zhòng kǒu nán tiáo

羊羔虽美，众口难调。

Though lamb may be good, it is difficult to cook it to suit everyone's taste.

zuì yīng xī qǔ de jiào xùn jiù shì dǒng de zhòng kǒu nán tiáo

最应吸取的教训就是懂得众口难调。

The most important lesson to be learned is that you simply cannot please everyone.