What you need isn't more complexity. You need .
The problem isn’t your intelligence. The problem is that most opening repertoires are designed for Grandmasters, not for human beings who have jobs, families, or a life outside of 64 squares. an+idiotproof+chess+opening+repertoire+pdf+link
Download the PDF. Play the London. Play the Caro. Stop sweating the theory. Let your opponent be the one who forgets their line. You will be too busy crushing them in the endgame. What you need isn't more complexity