I struggled with Gantry 4, and even more with Gantry 5.
However, after using Gantry 5 on a few projects, and experimenting with it, I think it's fantastic. I totally understand how it can be difficult to grasp, as it flumoxxed me when trying to get used to it.
I think part of the confusion, to me at least, is when some of the templates have modules assigned to positions in the Joomla module manager, whereas other's have modules loaded into Gantry 5's layouts. I guess this is part of it's flexibility, but it's not instantly intuitive at times.
Something I'd recommend is after using a RocketLauncher install, to delete all the sample data and create some basic layouts just using the Gantry 5 layouts. I have to admit, that even when Gantry 4 was release, I was a bit "meh", as I always just liked using Versatility 3 and I was set in my way of working.
Times do change though, and I'd certainly recommend giving Gantry 5 a chance. Hopefully it will bring you a eureka lightbulb moment!
The following users have thanked you: Reggie Simmons, Zbigniew Sokal