Apple Maps has a good UI and bad data. Their problem is the same problem people face when anyone tries to unseat an incumbent platform: they don't have the audience, so people don't contribute to their knowledge base. Apple Maps shows an Indian restaurant in my neighborhood as open on Saturdays, but they haven't been open on Saturdays in years. They didn't even update their hours on their own website, but the hours are correct on Google Maps. Why? Because business owners maintain their info on Google Maps, because it reaches their customers. And the customers do their own editing of business data as well. So Apple is stuck at a point with not enough users to edit the data, and they are either not climbing out of that rut or they are climbing out very slowly.
I just compared for my town. Popular cafe on Google maps has 844 reviews, 0 on Apple Maps. Another cafe, 202 reviews on Google, 1 on Apple Maps plus Apple hasn't updated the name. Also I quite like seeing the review text on Google, gives you a sense of what people like about a place and whether the review is genuine or just a grump. Apple seems to only show quite a simplified rating, although I've not used it enough to determine if there's more info in there.
Apple is probably better in the US where it has had a lot more use. It's pretty poor here for the main thing I use it for - finding businesses.
