Not my actual choice for the supreme ruler of the Dragon Ball Multiverse (don't even bring up Tori-Bot pls) but I get what his character is supposed to be, it's much better to accept it than overthinking stuff and theorize he is secretly some demonic entity, waiting for whatever moment to reveal itself.
I actually think he's quite interesting, so I don't really hate him per se. I mean, he's the childish, nigh-omnipotent ruler of the Dragon World, the fact that something like that was unexpected alone made it interesting. Still, could really use some depth and history to the character. Because so far he seems more like a plot point than an actual character to me.
Plus the fact that Zeno isn't inherently evil, just too immature to realize the difference, makes for some intrigueing story. I do wonder, if someone actually managed to convince Zeno that erasing people like that is bad, would he actually stop doing so? Kinda like Innocent Buu and Mr. Satan.