What kind of layouts is raided easily?

Layouts that are easily raided are those loosely made layouts.
These layouts are those which has unsystematic and unbalanced placement of the defensive buildings and other structures.
Layouts which has more defensive structures concentrated on one side will be easily attacked by troops attacking from the opposite side with the lesser defensive structures present.
Base layouts that does not contain the maximum wall level for a designated town hall are also easily raided because the troops can easily penetrate inside and destroy defensive building.
Layouts should be thought of carefully because this determines the capability of your village to defend against enemy attacks.