If by troublesome, you mean a problem people once had, they tended to act sick to get out of work, they worked slower when angry with their owners, and so on. They also escaped rather often when they saw how wrong they were treated. I highly disagree with slavery, but there is your answer.
slaves were viewed as property not as people
The slaves' freedom was denied by the concept that slaves were property, not human beings, and all human beings are free, but not property, so slaves were denied freedom due to the concept that slaves were property, not people.
They viewed slaves as property that could simply be replaced.
Slaves didn't earn anything, they where treated as property, and you don't pay your property
was slaves counted as people or property
Marriage. Since property had no rights (and slaves were considered property), a marriage between slaves was not recognized.
The southerners viewed slaves as property.
The term that refers to slaves that do not have the right to own property is chattel slavery. Chattel slaves are considered property themselves and have no legal rights to own assets or possessions.
Slaves were property, like cattle.
Property
Slaves had no rights - they were considered "property"
they were property of slave owners(the people who brought them form the market).