Why are the other woman complaining about the work?

The
other women complain about the work in the factory mills because the work is dangerous. Bodily
injury from working the machines was not uncommon due to the number of moving parts in the
machines.

On top of that existing danger, men like Marsden see only potential
profits, and he cares very little for the well being of his workers. Part of the reason for that
is because so many girls are trying to get work that many of the girls are easily
replaced.

Whenstarts working in the factory, there is some complaining;
however, the women really start to voice their opinions after the speed up. Many of the girls
simply can't keep up with the increased pace, and injuries become more common. As the novel
progresses, Betsy actually goes so far as to compare factory girls to slaves in chapter 13.
Lyddie is adamant that she is not a slave because she is paid for her
work.