Tierra doesn’t have the population or resources to really achieve autarky, it’s not the US or the Soviet-Union who had enough resources for survival and were strong enough militarily that trade and diplomacy mostly become, nice to have, optional things.
I think he’s at least moderately progressive socially and economically what is more worrying are his autocratic and war-mongering tendencies.
King Miguel is incredibly dangerous exactly because he is at least relatively competent.
He also simply rubs my mc and me the wrong way. In modern times he’d be one of those politicians, like our current PM, who always manages to devour (proverbially of course) his allies and coalition partners yet come out relatively unscathed himself. Which is what makes my mc rather reluctant to associate too closely with the guy.