Decks other people wrote usually aren't useful. You need to make your own flash cards. It's painful, but it's much more useful.
When I am exposed to some new thing, parts of it will stick immediately, and other parts will need some kind of processing on my part before I internalize it. When you are exposed to the same new thing, those parts that stick and those that need processing will usually differ from mine. Hence it's hard to make a deck that works well for the majority.