Take a look at SULFUR, could be what you are looking for. I think there is a demo too.
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Have you checked Gunfire Reborn? I think it’s very similar to what you want albeit with roguelike elements.
Yup, I know your feel. The most recent example I can think of that has a good blend is the Halo series (at least on normal or hard). You can jump around to try to avoid getting shot, run to a different area, sometimes find different guns laying around to help certain situations. I had a good time replaying the original when it came to PC.
Closest thing I can think of to that would be Destiny 2.
Normal Strikes and patrols in the open world you can shake off most incoming damage easily and leap about all over the place if you so desire.
Something looser like Borderlands 2 but cranked up and with crazier guns sounds fun though. There was a MOD for UT2K4 called Fraghouse or something like that that scratched that sort of itch for me way back. Install monster packs and run around like a lunatic killing waves of ridiculous creatures with redonkulous guns .
Ultra kill? Maybe mod up some games to make them feel like a boomer shooter?