LeBron took his pre-game warmup very seriously, as he was determined to prove in this game that he was not just an "enhanced version of Pippen" and that he could demolish opponents with his offense as well.
However, his playing style was set, and when facing a team with a "heavy tank" compressing space inside, he struggled.
Especially the Cavaliers during the 1.0 era with "Young LeBron," this was even more the case.
The reason was simple:
The Cavaliers already had a large presence inside with "Big Z" standing in the paint, how much space could there be left if the opposing team also had a big body?
And his breakthrough was not like Wade's or Su Wan's, where they would shake off defenders before breaking through; LeBron often relied on a "hang on people breakthrough," using his strength to bulldoze into the paint like a "bulldozer." As a result, with one more person under the basket, space was further squeezed to the limit.
So, facing such teams, he often did not perform well.