No it's not easy at all! I agree 👍
I've been on this particular project for years. And the book ... well... for three now, I think!
I just keep chipping away and take breaks when needed and then return to it when I'm ready again.
Maybe just do that. Slow and steady wins the race. Keep writing. You write well and you have a voice. For sure. And a good mind. For sure.
I bet you have a lot to say all tucked away inside you and nobody has been around to listen to you.
Keep writing anyway. We will find you. See? I did :)