Worst summer job I ever had?

I don’t think I’ve ever had a bad job. But the job that I had that was both the most annoying, and boring was my lifeguarding job. I went through two weeks of training to become CPR, and First aid certified. All I really do though is sit in a tall chair all day, and stair at the peaceful water. Sometimes I’ll have 5-10 kids come in other times I’ll have nobody. Once in a blue moon we will have big parties come in, which I didn’t entirely hate, except when people who planned the party or went to the parties knew me, they would try and come up to me, and talk to me while I was on duty. I am the type of person for out of respect I will make eye contact with you while you talk, so when people would come up to me while, I was watching munchkins swim, made it really hard for me to do that. But without being too mean or disrespectful, I would tell them I was working and I would talk to them on my next break. While some people understood that and walked away, others continued to talk to me. Meanwhile after my shift was over my manager would always come out the pool area and tell me that I needed to focus on my job, and not talk to people while I’m working. A lot of times I would apologize and simply just tell her I told them I couldn’t talk but they proceeded to talk to me. And while my manager understood that, she made it very clear that I needed to be more authoritative when on the job, and I needed to make it very clear that I was working, and am not to be disturbed.