Turkish Airlines Flight Attendant's Unprofessional Behavior

I was boarded onto the plane fifteen minutes late. Subsequently, constant announcements were made urging everyone in the aisle to hurry. If there is a delay, why are we boarded fifteen minutes late? There were nearly a hundred, maybe more passengers on the plane. One flight attendant was wearing a mask, but nearly a hundred passengers were not. When I pointed out the situation due to only one staff member wearing a mask, I received a response saying, 'If you don't like it, you can get off.' Another passenger's luggage was placed where I had put my cabin baggage, and I was told, 'I will place yours after putting this one here.' When I objected, the cabin supervisor was called. 'Is there a problem?' I was asked. Despite having traveled by plane numerous times, it was the first time I witnessed a flight attendant saying 'You can get off' while the plane was about to take off.