Usage of luck:
Luck is an uncountable noun, which means luck when used with bring and have. Luck, when used with may, wish, etc, means lucky, lucky.
Luck can also mean luck, which means that personal success depends not on ability or diligence, but on opportunity. Luck often takes an infinitive as an attribute.
As luck would have it has two opposite meanings, lucky or unlucky, and the meaning of the sentence depends on the context. Worse luck means unfortunate, not more unfortunate.
Extended data:
Explanation of key words:
Luck
Luck; Lucky; Something that brings good luck.
Vi. by luck, lucky; Happen to meet
Bilingual examples:
They? should win，given? a modicum? of? luck.?
With a little luck, they will win.