i mean if only inter, lazio and napoli had a decent result every time juve lost a point, they should already have catch up with them. but they don't. like borkos said, they are really inconsistent, mostly when they should have won to cut the margin points.
since january only milan who has had a quite consistent performance. they left behind in the opening season but now already in 3rd position.
and yes, with their inconsistent results, this year seria a is just like what you said.