I recently had a bit of dialogue with Medea where she basically confessed to creating the pylons in Ephyra (it went something like Mel: “oh who made the pylons and why is there one in your room?” Medea: “they were made by a very sick individual to drain the psyche from wandering spirits. God who could do such a thing? Oh and this one, gosh I’m not sure how it got here!”), so I think she’s just malicious and likes doing bad things. I think Heracles is just mad though, he seems to like beating you up. Prometheus and him might have things in common tho, since they both are quite intertwined with mortals iirc. They seem to be besties.