My child asked me questions that make me rage uncontrollably at them? Am I a bad parent? No, it's the video games that are the problem. - A philosopher named my mom
Hmm. Even Wolfestein 3D was more of a Gen-X than Boomer generational thing, so setting the bar at Doom seems a little misunderstood of who actually played those games.
The term "boomer shooter" became a running joke within the team behind the aforementioned Dusk, which launched in 2018. Andrew Hulshult, who composed music for Dusk and other similar titles like Amid Evil and Prodeus, said on X that the team saw it being used to describe the original Doom, so they "ran with it because it was funny."
Supporting GameGod's statement that it's intended to be funny rather than accurate.
Lots of insults were intended to be "funny" and not accurate. Ask anyone not pale as snow from the Civil Rights era about how funny Sambo and Aunt Jemima intended to be "funny" were. Just because the bigotry is aimed at old People doesn't make it cool.
It's not meant to imply that the games were primarily played by literal boomers; "boomer shooter" just rolls off the tongue a lot better than "gen-x shooter" or "early-edition millennials shooter". Are you the sort of person who goes to the Steam page for Rogue and challenges the 'Traditional Roguelike' tag because it's not rogue-like if it's actually Rogue? :P
It is a intended as an insult. It is intended to insinuate out of style and old fashioned. Has nothing to do with the rhyme. Rogue is used to describe those games as they are "rogue like". If this were similar it would be "doom like".
Shooters where you can carry more than 4 weapons, the map is usually not a straight line, key hunting is often involved, health doesn't regenerate, etc etc. Oh and there's usually a lot of weapon variety I guess.
Now please hurry up and vote for Bullet Heaven on Brotato and its colleagues so we aren't stuck with something as terrible as "Survivor-likes" or unweildy as "Action Roguelike - Bullet Hell"