Because what it’s in response to is so high class?
They took the let’s go Brandon meme, added some actual humor and cleverness, and rolled with it. Sure, I would love to live in a world where you didn’t have to lower yourself to play someone else’s game, but when you’ve got millions of people who think they’re being clever by saying “Let’s go Brandon” instead of “Fuck Joe Biden”, I think Dark Brandon is the perfect response.
They’ve already shown that nothing up to and including Trump literally murdering their family members would convert them. Of course a meme isn’t going to, it’s not about that. It’s about taking something they think they’re being clever about and turning it back on them in an actual clever way. If the Dark Brandon memes were started in a void, I might agree with you that they were dumb, but as a reply to the LGB meme, I think they’re excellent.
I mean, humor is subjective, but I gotta say you’re most likely in the minority of people with average or above average intelligence (aka non-Trump voters) with that opinion. To be honest, I checked your post history to see if you were one of them because you are giving off that iq-is-slightly-lower-than-room-temp vibe here.