The problem is that almost all technology stories are in a hurry to use advanced technology. Before this MC was average to the bottom of the class, you can improve your studies, but you cannot become an inventor within 1 month. He makes something that is 4.5 times better than the whole world, which is not compatible with reason. There is also a young rich girl who comes to invest in your card. Among all the technological novels that I have read so far, there was one that did not progress all at once, but slowly progressed, but I have not found another one like it. (Google Translate)
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LIKEYes, the trend amongst writers on this platform is to compromise character and world integrity for a grand show of theatrics, like a character awakening power instantly or achieving a goal that would take years in a few chapters, simply for reader retention because readers these days hop out of a story if there isn’t a major event every few chapters.
Also for some reason he enjoys leaving his life in the hands of other people. I mean the system allows him to buy stuff why can't he buy something that can protect him