Hobbs, it's simple. LeBron is an absolute beast against bad teams. That is why he's so statistically dominant during the regular season. That's how it's been since he's been in the league. I bet if you look at his record vs. contenders it's horrible (like the Heat last year).
Towards the end of the playoffs, when the teams get tougher, he's not the same person we all vision him to be in our minds. As soon as he hits a defense that can keep him out of the paint, he turns into a pass-first player or an outside shooter.
Does that mean he couldn't have had a better series if he was more aggressive? No. But Wade was embarrassing him on the court, and he absolutely shouldn't have been the second option vs Dallas. What LeBron did in the Finals was actually the right thing, Wade was looking like the two-time MVP.