I prefer OSMand over Organic Maps, because it has much more features, just the map renderer isn’t as pretty.
But I mostly use it for pedestrian and bike navigation. But I think car navigation works very well as well.
Also, if the map data isn’t so great in your region, you can try playing StreetComplete and help improve it yourself.
OSM is the Wikipedia of map data, and offers likely the most detailed map that we have.
Well, in that way it is a classic open source software, very powerful but a bit difficult to use.
I rather have features I need hidden behind a cryptic interface, then not have them.
I also normally carry around a power bank, and sometimes have to recharge my phone at lunch, when using it intensively. That seems just normal to me at this point.