https://store.steampowered.com/app/393380/Squad/
This is my favourite shooter, based on the Battlefield 2 mod Project Reality. Everything feels, looks, and sounds realistic. Matches take several hours and have a lot of coordination between specialised squads. The maps are huge and detailed. I’ve played rounds where I only fire a couple bullets and like PUBG it’s so much more thrilling than an arcade shooter with nonstop action.
Does the new ARMA have a more intuitive UI and control scheme than ARMA 2/3? That’s what keeps me from recommending it instead. Squad is much more streamlined in that regard without losing the depth, like comparing Dwarf Fortress and Rimworld.