At long last, they are all dead.
The Queen was a real headache to get to. She was spawning soldiers so fast even a raging inferno, burning them in waves, couldn’t deplete the stockpile. Eventually I had to just keep pushing forward, until I managed to catch her in the flames and she burned to ashes. Then I went chamber to chamber, and annihilated every last ant.
About 4000 kills in total, at the end. I can now continue my vast underground tunnel network, connecting me to various labs, basements and caves across the area, so I can travel long distance regardless of the time of day.
In other news, I gobbled some more mutagens and although I lost my Inconvieniently Large mutation, I got Light Eater and Quick. A fair enough trade I guess. Plus I prefer to just be a smaller sized troglobite dude. Also, survivor masks rock. It’s great to be able to ignore smoke and gas, especially when fighting certain zombies.