I'm under the impression that since Doom Eternal (the first after Doom 2016), the gameplay has considerably shifted to an "interconnected arenas" style, and with more sophisticated combat mechanics. Many games have started adopting this design, for example, Shadow Warrior 3.

I also dislike this trend. As a sibling comment noted, boomer shooters are generally closer to the old-school Doom gameplay, although some are adopting the newer design too.

The enemy cap all but forces the arena style gameplay. Doom 2016 tried to hide it more, but it still felt very stifling.