Work in factories was always terrible. people worked 14 hours a day, 6 days a week. It was clock based work. Every worker had a quota. The work didn't change in the seasons.
There were new jobs. Citites began to urbanize. Labor Unions sought higher pay and shorter hours, along with better working conditions. Over time, there was better housing along with healthier diets and nicer clothes.
New middle class
Rockefeller was the owner of the biggest oil industry in the world. Carnegie owned the biggest steel industry in the world. Carnegie was the richest man in the world and Rockefeller was the second richest, they were always competing against each other to see who would become the richest. After a while, Rockefeller gave up in that contest and started donating his money, making him look better than Carnegie.
6 year olds worked in factories. If they were distracted, thy would be beaten until they went back to work. They would be injured by machines. And sometimes the type of job they would have would be very unhealthy.
The middle class was growing. Factory owners, merchants, and shippers were part of the middle class. The standards for living were rising.
Homes being built weren't planned completely and had no sanitary codes. Lacked adequate housing, education, and police protection.