the awesome linear mazes which end two steps away from the entrance?
Fallout 4 is a bad game, praising one part of it will not make you fanboy. So no need to be edgy and hating every aspect of it, instead give credit where credit due, and the credit goes to dungeons in F4 that are really good.
Sure there are some small linear locations in Fallout 4 in form of stores and houses, but there quite a few large factories, underground bunkers, random large buildings that have multiple entrances, multiple floors that can be explored in nonlinear manner, places with hidden loot, areas that reward your skill use and environmental storytelling.
Compared to Oblivion, Fallout 3 and Skyrim, Fallout 4 is far better in that department.