I don’t think it’s so much his point production. It’s just that Marner isn’t very physical and gets pushed off the puck very easily. You also won’t see him back checking too hard very often. He’s not “built” for playoff hockey. That, and the Leafs losing 99.8% of the time in round 1 set up the perfect flame. I’m not saying that it’s fully my perspective, but I believe that’s why Leafs fans target him, rather than solely his point production. Yes, I’m aware that Marner’s there to be an offensive player rather than lay out the body but that’s why he receives the hate.