Dollar Tree review: employee claim

I would like to report the store manager of this store for manipulate me a former employee, against an assistant manager. I was not going to fill the claim and she manipulated me into it. She doesn't train her employees in order for them to fail, if she feel that a person is better and intelligent at the job she does everything to make them quit. She mess with employees hours when she is mad, she gives no appreciation to the workers, also when we are hired they told us the schedule is flexible so this means that nobody can be special or for personal reasons be in preference over others. I am cashier, and I asked her for the morning shift if it was posible and her answer was "No, I have this person for mornings she is my main". This violates the ethics of labor, because every worker should be treated equally without preferences. I did not expected to have all days in the morning, but some of them like I think its supposed to be, a rotation of schedule hours. I really thought that she was a good person, but now I know that she is a very mean human being that shows you trust and then stabs you. I in all my knowledge declare that if you want your stores to succeed more, you should put people educated, capable to work in a team, training included. Customers complaint all the time about her dictator manners, she treats her employees like if they were kids, rude and unprofessional. I hope you reconsider what kind of people you put on front of an operation like this one so big. Thank you very much, I had to say something not only for me but for my colleagues that feel suppressed also.