Dollar Tree review: general manager and customer service

I arrived at the store, the morning of 12/20 around 10am and realized the store was closed until 11; that's ok I went back later. The manager at this store is a liar and a little [censored]. The sign on the front door says 11am-6pm. They were closed at 530pm and said the store had been open since 830am. When questioned about the sign the young man said there is nothing he can do about it. I asked who the manager was so I could make a friendly suggestion and he says "I am the manager, there is no one higher than me." So he can fix the sign. While talking with him another employee behind him began to curse at myself and other customers outside. When I told him to fix the sign he threatened to call security and told me to leave.