why is martin m martin only 260 elo

good theory

maybe his only source of learning is chess, so he learned english, history, math, all from chess, and he doesnt have the iq to get better.

And that's not how IQ works, it's not like a video game. Just because your good at English doesn't mean you can't be good at something else

Does anyone know how to mate with a queen?
https://www.chess.com/game/computer/234841369
like this
martins description says hes played hundreds of MILLIONS of games, unfathomable to the normal chess player, and he still has 260 elo. at this rate, he should have a elo higher than his wife, and ofc magnus lol