Only using W-L as a metric for Means is a bit silly, especially when you're arguing we only think he's good because he was a standout on a bad team. That's why his W-L record is mediocre! But he's good when he's healthy.
And as for Mullins, yeah, he's not that great, I'm not saying otherwise. I'm saying, though, that his 2021 was truly great, and that's why people got the idea he was better than he's ended up being.