When making complex scenes there should be some kind of "folders" (i.e. like in Adobe Photoshop, layer management) in scene outliner, that can group objects together - but this feature seems not present.
Is there some addon or way to manage scene "like a pro"? I find groups very unfriendly and object parenting is somehow useful, but not quite good in my opinion for right scene organisation.
For scene organization and layout have a look into the new Collection System introduced as of Blender 2.80. Collections are essentially like folders, they are artist friendly and can even be instanced. There is also a Collection Manager add-on shipped by default which allows to quickly enable or disable collections directly in the 3d View and a lot more:
Notice that you can have multiple windows of the Outliner and set each to whatever object/data type is required in your situation by using the Filter menu in the header:
For versions pre 2.8, I'd suggest use the layer management addon for a better scene organization, which is shipped with blender by default:
In addition, the Outliner provides some functionality to display the desired data types like Groups, Same Objects, Selected Objects etc.:
