I think it is what you make it. Remember if there wasn’t any dark then there wouldn’t be light. Without cold there would be no hot. They are the same thing, just at different degrees. If there wasn’t bad then how would we define good.
Happiness is a choice, rarely are we true victims in our life. We have more control then we think. And, when “bad things happen to good people” it may just be the contrast we had to have in life for something good to come from the bad.
In short I agree with several other people I think the meaning of life is what each individual makes it, and also may depend on the lifetime.