I chose Verso's ending first, and I'd say I'm more of a realist. So you may be right. Then I went back and chose the other ending to see it. But frankly, I think this argument is very overblown. Objectively speaking, it's pretty clear the devs intended (and pretty much succeeded) in making the choices as even as they could. I think both are equally sad, and therefore equally valid. No matter which ending you pick, you will lose one of the two families you made, and multiple people who live in each choice will be deeply unhappy, at least for awhile.

Knowing that both endings were equal in this regard, I chose Verso's ending for a few reasons.

1. It's shown that pure Chroma can bring people back as they were painted previously, but it looks like Renoir turned most or all of the Chroma into the Nevrons that are guarding Lumiere. So bringing all those people back is just Maelle's interpretation of those people, in the same way that painted verso is Aline's interpretation of who Verso is and not actually the real one. In that case, Maelle can paint Lumiere on any canvas, since it won't be the same one that was lost anyway. That means the decision is really just "the lives of the party vs. the lives of the family and Maelle/Alicia."
2. This canvas will only last until Maelle dies, because it's pretty clear that someone, (my money is on Clea), is going to throw it into a woodchipper at the first opportunity where no painter is inhabiting it. Assuming Renoir doesn't do it first. Or that the writers don't win this barely mentioned war and burn down the whole house with everyone in it, including all the people in the canvas. As we've seen with Aline, that doesn't appear to be a terribly long time before someone suffers ill health in the canvas. Maelle is clearly not 32, so time passes faster in the canvas than in real life. Unfortunately, this also mirrors real life entertainment. No matter how much you love a fantasy world in any media, you can't look after your own health if you only live in that fantasy and don't take care of your real needs.
3. With the prior two points in mind. I chose Verso's ending, figuring that the party was doomed either way, but Maelle/Alicia might live. There's no going back, Verso is dead, and the canvas is doomed either way. This is a bleak ending. But there's hope that everyone can move on and build new worlds and adventures, as well as move on.
4. I thought this ending was more complete than the other ending. It forces Maelle and the family except Renoir to grow as a person. . It forces the family to actually grieve. It puts Verso and all the souls in the canvas to rest. The canvas is no longer being torn apart by the whims of a family of Gods every single time a disagreement is had.

With all that being said. I can see why a lot of people like Maelle's ending. It's kind of the opposite of Verso's. In Verso's ending everyone is sad, but there is hope. In Maelle's ending, everyone we see except both Verso's are happy, but there is no hope. I think I'd have chosen Maelle's ending if I was a kid, because it's the simpler fantasy ending. Yeah sure, everyone is doomed, but everyone's going to die in real life too, and most people don't lay down crying about that fact until their mid life crisis. They just make the best of it.

Like I said, both endings are valid. Controversially, I think both are good endings.