Book idea

I have an idea for a book and I'm very enthusiastic about it!

It's a story about this magic land where everybody hate each other and there's elements like magic and religion.I guess that we can see those things in stories like game of thrones (by the way I have to see from the beginning before season 7,I forget everything)anyway,it's not like everyone fighting for power is more fighting for controling the people and their mindset.
You know just like today's era. Today there are 2 sides to choose and nothing in the middle.If you're in one side you think the same way the herd thinks..

I'm sad!I'm tired of these times,everybody getting triggered all the time and it's not always the left side,the right side is also very triggered.Can you all just stop and talk with each other..serious we can learn more from each other by that way..

This is for sure a rant,but I still have the idea of the book.
I wanted to be dark,have a lot off messsy shit and have a bad ending.
Just like real life(kidding) I think it's more good when you put tragic in your story.