Hey. Actually "Fuck life" would mean something along the lines of "Foda-se a vida". If you mean that living is difficult or complicated at the moment, maybe just say: "Living is fucking hard" (if you want to emphasize it with "fuck").

Can you give some context for it? From what I can tell it seems to be something along the lines of saying "Fuck life" as you said, however here in American there is a slang phrase "fuck my life." This is something people say when bad things happen to them, and you will often see it abbreviated as FML. If you can give some context I'll see if that is what it means or if there is another meaning that is better.