It starts very well, honestly, although the beginning is forced and an event happens for him to go to the league of shadows just because of the reason that the author wants to get the waifus there, the plot starts well for a fanfic... But everything it goes downhill when there is descendant drama, and these multiverse OP entities meddling in the MC's life.
Why can't we just have a direct reincarnation? Why does he need to reconcile with his system? Why does it have to be so complicated? Now, in the recent chapter, he was an existence similar to an Edritch god, he was unique, now thanks to his SIMP for his death, he 'forcibly' signed a kind of contract for his soul to be handed over to her if he died thus completely losing its unique status.
Yes, this had a lot of potential, but it was completely destroyed by the pointless drama, and these multiverse beings that keep sprouting out of nowhere. It's only the 20th chapter, it's at the power level of a city destroyer, but these beings keep appearing like flies, meh.