Review Detail of LemonSpatula in Dxd devil gamer

Ill provide my outlook of this fan fic: 1. The MC has too many bloodlines. 2. The development is too fast! Like in one chapter mc developed his breathing technique like in 3 weeks. Are u srsly saying he is that much big prodigy? And also he says smthng abt him hating prodigies as they r like young masters but i know from past experiences he will also turn into one. 3. Srsly provide proper details on how he is training one thing if u are going to make it a slow paced ff