Swanson had 1.4 WAR last year for $1,250,000, Teoscar had 2.1 WAR for $14,000,000 plus the Jays got SP prospect Macko and then Teo walked away from the Mariners for sweet F all
So yeah, it was a steal really
Whatever he's doing with the Dodgers this year has absolutely no bearing on that trade in any way
Atkins deserves to be criticized for some things, but that trade isn't one of them