What if you’re wrong?
The exercise for today might break your heart, but it’s necessary.
Go through a list of the supporting characters, and tell the story as if it’s theirs to tell. See what they bring to the table, what might change, etc.
Does this add something to the story?
It’s entirely possible that your main character isn’t ready to be the lead.
This is especially true if you’re guilty of self-inserting. No offense to Stephen King – I am a huge fan – but he does this quite often. His side characters always compel me so much more than his protagonist.
See and decide if the story is worth telling through a different set of eyes. Maybe it’ll be even better.