Review Detail of DemiLich in TBATE - A More Experienced Hero

I like to use one simple criterion for fan fiction: the moment when MC breaks off the original story. 20 chapters in, looks like superglue was applied between MC and original story. also, mc's character setting seems to be a lie, as he should have methods enough to complete the world in 5 years or so, or at least do stuff other than cultivating diligently with the OG MC. overall utilisation of MC's character setting advantages are around 5% at best. world bg is good due to original world building, story development? really? writing quality regarding grammar is great, I guess.