The personality shortcomings of the Iron-clad Golden Dog mainly include the following points:

1. Lively and active: The Iron-clad Golden Dog is very lively and energetic, and needs a lot of exercise and activities. If they don't get enough exercise and stimulation, they may exhibit destructive behaviors such as biting.

2. Loud barking: The barking of the iron-clad golden dog is relatively loud and may bark at night or early in the morning, which may affect the rest of family members.

3. Possessive: The gold-clad dog sometimes becomes jealous of other pets that may appear around the excrement collector. This can lead to a bad temper, which may also affect the harmony of the family environment.

4. Difficulty in hair care: The hair of iron-coated golden dogs is easy to fall off, especially during the moulting season, and requires regular cleaning, which increases the difficulty of daily maintenance.