He probably just plays for fun, with no desire for improving. I made 1850 after a year and a half by learning from my mistakes and studying. He probably does none of this so he could play 1 million games and never improve because he will continue to make the same mistakes over and over.
You were 1850 after a year and a half, but your national rating is 1000?
Seems you're exaggerating a bit again.
True