John Carmack had no hand in DOOM (2016), and was out of iD Software for quite a while by that point, so I have no idea why you felt the need to bring him up.
That explains why there was so much hype for how good Snap Map (the level editor) turned out. I remember playing with it for a bit, and it seemed both powerful and super easy for someone with zero experience in it to get something simple but fun going.
This is what we are lampooning.