It was, as another person who liked the show. It very much was.

I liked the characterization displayed between them on it though, with afterwards him trying to awkwardly empathize with her noting that people say mean things because of how he looks too, and she's just 100% not getting the idea of humans hating humans, intra-race discrimination just isn't in her understanding, so he throws her an out with "because I'm half-robot."

It was very 90's "Very Special Episode" energy, but the characters didn't grandstand on it, and the fact the guest protagonist of the episode was a racist actually didn't impact the overall arc of the character. He was a racist. He still solved the problem, still was useful, still helpful, Robin politely asks him to leave Earth after the problem was solved if he's going to be a racist little shit, and he does, noting Starfire is "one of the good ones" from working alongside her but to watch out for any others of her kind, as parting words of wisdom.

The episode basically ends with a "whelp, we saved Earth again, thanks to that guy... Man that guy was a racist bastard though, wasn't he? Oh well. Who wants dinner?"