"People are inherently bad" is an awfully reactionary take, but holy shit does working in retail make you feel this way - at least under an overbearing culture of self-centered consumerism. It does tend to vary depending on where you work though. Doing grocery or food service puts you in front of a firehose of people who for the most part will treat you no better than an automaton or their temporary servant. I had a gig at a pet store for a while though and it was noticeable that most of the customers had at least enough compassion in them to care about keeping an animal alive. There were still assholes, but the vibes were generally better overall.