I get it. When I was a kid, the zoo was a magical place. I loved it. I dreamed of working at a place like that. I always thought "when I grow up and have money, I'll visit every weekend". Instead, as I grew up, I started visiting less. I just can't do it anymore. I'm not saying I'd never go again, but it's not likely. I don't enjoy it anymore...
Dude, I feel the exact same way. I was once to a zoo in a foreign country and it was the saddest thing ever. The cages were dirty, the animals underfed, but the saddest thing was the tiger. He was the only tiger in the zoo and he was missing one foot. I kid you not. He gave out strange noises as if calling to somebody, maybe he was in pain, maybe losing his mind. The people who worked there didn't care and looked tired and depressed. It was heartbreaking. As far as I know that tiger is no longer in that zoo, but I don't know what happened to him.