He's good at governance because he doesn't let arcane, fictitious concepts like "law" or "the constitution" stand in his way of enacting his governing agenda. And yeah, as you said, he's incredibly effective, especially given he has like no popular mandate for these moves. He's moving like Lincoln and FDR. He's getting his agenda enacted, which means he's good at governance. A Democrat giving up on enacting a minimum wage hike or student loan forgiveness because they defer to the Senate Parliamentarian is an example of weak, bad governance.