I don't think there is a right or wrong in this game, it's all about preference. I also saved Chloe and do not regret my choice. Yes, after completing the game I also said "I was in Max's shoes and I would do as I did in the game", though I must admit that it would depend heavily. But did I stand in such a situation, similar to the story, I think that I would genuinely do the same thing. Either way, you have to live with a terrible tragedy. Save your loved one and live with the destruction of a city, or sacrifice your loved one and save a city. The choice is yours. Also, I had the idea that the storm was a natural disaster. They happen all the times, in all shapes and sizes. You can't prevent them, only warn people they are coming (like a tornado or a tsunami in the distance). On the other hand, shooting someone and killing them, is an act done on purpose. You grab your gun, think "Im going to kill that bitch!" and then do it. You are therefore fully aware of what you are doing, and I don't care if you realise too late, like Nathan seems to do, what you have done. Because someone is bullying you, doesn't give you the right to kill them. Maybe beat them and teach them a lesson, but not death. Especially not for someone like Chloe.

The above is just my opinion. Interpret it as you will, im not going to change it.