Boltgun's alright. My favorite of the neo-retro shooters is Amid Evil. (Weird to call a game with RTX raytracing support retro, but that's 2023 for you.)
But honestly, IMO, if you want to play Doom or Quake... I recommend just playing Doom or Quake. The modding scene for both games has been active for nearly 30 years, and there's still excellent content coming out for both games regularly. If anything, modding popularity has accelerated in recent years thanks to "Doomtubers" like decino giving additional exposure to custom maps. Dwell[0] came out this year and is one of the best Quake map sets/mods ever, and the Cacowards[1] always has great stuff, with the 2023 edition coming soon.