I actually like doing customer service in certain respects. The problem is 1: a minority of people are truly awful to service employees and the harm they do often outweighs the larger numbers of kind people, and 2: most organizations don’t do enough to protect their employees from those harmful people.
It’s not customer service itself that is the problem, but the culture and structures that surround it that make it awful. In a better world I think many people might find it fulfilling work.