Further south and I would guess broad mites, as they leave curled leaf damage that is often mistaken for herbicide injury or virus symptoms. But I don't exactly think Ontario when I think broad mites.
I've never seen flea beetle damage distort leaves to that extent. Maybe a little wrinkle here and there, but it's usually pretty straightforward looking damage.
Maybe mites came in on something you purchased at a nursery and planted nearby? Broad mites are very very tiny, though--among the smallest of the mites. You'd need a really strong magnifying glass to see them, like a jeweler's loupe.
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