/soy/ - Soyjaks

I’ve got muscles for days and a chiseled physique,
But my time on the sharty is barely a week.
I never bore witness to the old days of glory,
The legendary jarty is to me just a story.

Yet if coal fills the catalog or the culture goes astray,
"It's the jarty's fault!" is the very first thing I say.
I loudly point fingers at history I didn't live through,
A handsome outsider with a scapegoat brand new.

Who am I?