WHY are you doing this, WHAT IS THE POINT
All you are doing is making characters suffer for no reason, even if we agree with you and say “ it’s just fiction”
All that leaves is a depressing story
Read the story spider-man rain if you want to see how that story looks
Plus doesn’t the game cover what your doing is wrong
You describe your power as a child playing with their playthings
You also seem to have the mind of one considering what you decide to ignore
Peter, gonna answer why you care about the story so much
Just wanna play god like a child? 
A God earns their worship
What have you done to earn yours?
... You sure like making long, annoying asks, huh? Look, I'm not making them suffer for no reason. Call it cliché, but it is character development. What I'm trying to do it adapt a story from one of my favorite games. While I like being god, my true intentions are to tell a story. Mostly, the story of AtDFF, and without Chara going through all this here, will never come to pass.
Sure, people don't like to see Chara suffer. Neither do I, particularly. But without Chara leading a rather miserable lift, never reuniting with their brother/figuring out Steorie is their brother, and all of their friends turning on them, Chara never falls down. Chara never meets the Dreemurrs. They never meet Asriel. And while yes, it would be interesting to see that timeline, it's not the one we're following. It still exists, of course. Evident by the other alternate timelines.
I'm aware, of what I'm doing. However my plan isn't for this all to just go up in flames and end in misery. I know it sucks now, but honestly, life sucks. And that's part of my writing. With AtDFF, a lot of the planned plot points are things that impacted my life, even small things. Trust me, I know you guys don't like playing the villains, I know you want Chara to have a happy ending, and trust me, she will. However for that to happen, there must be trails. I never said you have to play along, just that if you go to drastic measures, I'll ignore and stop you. No one likes playing the villain, however I know there are some who would jump at the chance to be cruel and mean. Which is what I'm hoping for. Because I can use them for my story.
If you fight it, then all the better. The conflict will add interest. It will make it more of a struggle for Chara and a challenge for me. But please, stop trying to mess with what I'm planning. For all you know, that might just make it worse.