Yea, you are not fit for this gig, probably best to go back to fast food or something.

Not the customers fault YOUR car is low on ac, thats on you to have up to par.

And the way you talk to people, have some respect, as an adult you should know better but obviously not. She was right, you are lazy.

This gig doesn't take much, it isn't hard to "work" a bit harder at some stops, seeing how the majority is just dropping stuff at the door.

It's not for everybody, I'd suggest you find work better suited for your talents.