I think, somewhat counterintuitively, Love is actually better against teams that employ standard post up bigs than he is against Warriors type teams that employ small ball. This is partly because Love gets good leverage and doesn't concede post position easily. But it's really on the other end of the floor where Love can really shine against such opponents. Traditional bigs just have too much trouble consistently staying attached to Love at the three point line...and if they do, that takes them away from the rim, clearing the way for the likes of LeBron to exploit. So even if Love concedes points on one end against those bigs, he more than makes up for it on the other end.
On the other hand, against a team like the Warriors, Love doesn't have the foot speed to deal with any aspect of their offense. He can't show and recover and, contrary to his famous game seven play, he can't be relied upon to switch onto the Warriors deadly scorers. Against GSW, there are few places for him to hide, and wherever he is hidden he is just a pick away from being forced to guard Steph or KD. That's why the Cavs often trap pick and rolls involving Love, but that presents its own host of problems. Most importantly, unlike when he faces a traditional big, Love's value on offense does not offset his limitations on defense. Draymond (or even KD) will happily switch any pick and roll involving Love, is perfectly capable following him at the three point line, and can more than hold his own against Love in the post.
