Review Detail of Mortimer_Darkbane in One Piece : My Revenge

The battles are just dragged out and straight up boring, The MC clearly have the power to solo One piece but still struggles miserably because of lame writing. The MC before getting system was able to go against white beared and Roger, but after getting the system and becoming tremendously more powerful, he still struggles against an old white beard and Garp. Also MC doesn't know how to take revenge, he just kills a bunch of old guys who only have a few years left to live in the name of revenge. The revenge was truly unsatisfactory.