Review Detail of R3vfor in Reincarnated and Regressed Villain - Make heroines beg for forgiveness

MC(After being betrayed by the people he saves in his 1st life, he vows to never make the same mistake again and 10chapters in what does he do??? well he goes and saves another "pitiful girl" he found in a church. Clearly not even remembering his vow), And the retarded author is so busy setting up for his "grand future wars" which is supposed to happen far off in the future and forgets that the MC is literally a 5year old outperforming beings over thousands of year old and they dont even question where the sudden powerup and change of the protagonist.