This plant has a really nice cucumber on it, but the leaves are starting to look bad. @grow-pro has been helpful with my tomato plant issue, so I'll ask about the cucumber.
Sorry this one's out of focus a little, but you can see how big the cucumber is!
Wide view of the various leaves with issues; close-ups after it:
That fly is one of several extremely docile flies in the garden. They rarely move, I don't get it. Very easy to get rid of, so I'm not complaining, but -- weird!
Thanks for your help! :)