Review Detail of raithena in Loser's redo: Transmigration in a novel

It was so good. MC had a rational mind. was cold and calculative. did not care about the original plot of the novel in which he is at all but then comes Chapter 102-103. Let's start from the beginning as to why I now consider this novel as garbage. We go through the first 50-60 chapters of MC trying to do everything he could to increase his talent and strength. He eats poisons. He takes drugs. He also eats a dragon lord heart (keep in mind that in the last 20000 years there has only been one dragon lord whose heart the mc ate) which marks the end of the whole potential increasing arc. Now from here nothing happens for the next 30-40 chapters except him getting ready for joining the academy and just some inner monologues here and there. Now the MC continuously mentions how all the main cast of the original novel and people around them were sent to a different continent by an event named 'magic disaster' which happens at the first year graduation ceremony. Keep in mind that right now the academy has not even started but the 'magic disaster' event already happens which is completely fine. Butterfly effect. However the most infuriating thing was the fact the author nerfs the MC by removing all his talent in which we had spent like 60 chapters. It wasn't just the MC losing some of his power. NO. His dragon lord heart became a skin bag and became useless. It was such forced nerf. Now why did this happen? Because of 2 interrelated reasons. [{1} MC was fighting a big boss character who is way stronger than him.] [{2} He used an ability called awakening.] Now the first reason is fine. The second reason is the one which makes me mad. 'Awakening' ability is something demi humans have which allow them to awaken there blood line. There were no drawbacks of this ability. This ability has been mentioned many times. However our MC had to suffer some drawbacks because he used this ability. As previously mentioned this was him losing all the talent gathered in like first 60 chapters. Everything done in those 60 chapters became pointless. Now I still tried to force myself tor read it but the plot became so bad and the mc became dumb. Like all the cool rational thoughts were removed and he became a shonen protagonist. I do not suggest reading this.