In my opinion a lot of what people consider the "software Quake look" is quite misguided.

Quake is actually pixel art, on a par with some of the great 2D side-scrollers. Adrian Carmack packed a huge amount of pixel-level detail into those tiny 64x64 textures.

That deserves to be seen at it's best.

So you don't blur it, you don't filter it, you don't blend it with colours that were never there in the first place, you don't smudge it or smear it.

But you also don't reduce it to even lower resolution, you also don't introduce huge amounts of noise and aliasing, and you definitely don't take the areas where software Quake was objectively worse and celebrate them.

It's perfectly possible to set up a hardware-accelerated renderer that preserves all of the crisp pixel-level detail and presents it in all it's glory. 

doesn't work on my pc? says i need vulkan? 

Yes, vkQuake requires GPU with Vulkan API support.