hate customer service

I work in customer service for an insurance company and hate it. It’s like working for big brother. They watch everything you do and have to kiss people’s butts on the phone. We now have to offer surveys at the end of our calls and part of our performance numbers is based on the results. We have to pretend that we really , really care. I am tired of being nice to people. I have always been a genuine nice person and liked people but now I cant stand people. My family notices how depressed I am. I try not to be that way but I cant get rid of the thoughts of this job. It’s constant stress worrying about my numbers and if I sound caring enough over the phone. Ugh!!! The allowed me to work PT for a few yrs and then made me go to FT where I could work 4 ten hr days. That was fine. Giving me an extra day off really helped with the stress. Now they made me go back to working 5 days a week with overtime.
I so want to quit this job but we cant afford it right now. I dream of telling them that I quit. I someday want to start my own cleaning business . I was just thinking about starting it when they made me go back to working 5 days a wk with ot. I have a 4 yr old at home too so dont know when I will find the time now. I feel like I am just buying my time here until they find a reason to fire me.