better be the head of a dog than the tail of a lion 宁为鸡头，不做凤尾

【例句】
I think you should look for another job because you'll never get a prominent position at this big company. Better be the head of a dog than the tail of a lion, you know?
我认为你应该找另一份工作，因为你在这个大公司里永远不会出人头地。宁为鸡头，不做凤尾，你懂吗？

Better be the head of a dog than the tail of a lion,This job is really not suitable for me.
宁为鸡头,不为凤尾，这份工作真不适合我。