Uchiha Shisui's only biological brother saw his brother being forced to commit suicide and his clan members being massacred by his own clan.
The entire Uchiha clan was stigmatized as a rebel and fell victim to Konoha's efforts to consolidate power.
What is the Will of Fire? It's just a hypocritical cloak wrapped around betrayal and killing!
Uchiha Jin, who lost everything, had his faith completely shattered.
There was no warmth left in the young man's heart, only the overwhelming hatred that burned everything.
Hibernating in the ninja world, working step by step, vowing to liquidate all enemies in Konoha Village, continue the Uchiha bloodline, and make the withered Uchiha prosper again.
The protagonist is too childish. Although he is indeed a child, at least he has past life memories. Why don't you write his mind as a child?
You can always use Konoha to gain experience, and you can always travel through the Uchiha clan.