best way to quit? :(

Breanna • Hello! 🌸💕
I've never done this before, and I want to put this is the best way possible.Im quitting my waitress job, because almost no training was given and the management has been terrible. I try my best and can only do so much, and now I hear the cooks gossiping about me in the back calling me an idiot for not knowing these things. Everyone has been rude, and I never received positive encouragement. I feel like no girl deserves to be yelled at by the cook, especially when the boss left her to work a shift alone with no training.
"Hello,I'm just letting you know that I'm no longer going to be working at Joeys.I don't feel like I received proper training, and to be criticized and called an idiot for something I put my hard effort into - I feel like no girl deserves.
Sorry for any inconvenience,
Breanna"
Is this an ok message to send?Its sad because we were starting to become friends, but I just can't deal with this.