I like progression fantasy, and this alright. I would say nothing really felt original, but there was an interesting combination of unoriginal things. The protagonist was deeply unlikable, the author continually has characters say what a great guy he is, but there is no substance to support it, he has "friends" that he treats horribly but who still love him, and he has one character trait - he's strong - and there is a revenge porn vibe in the way that he goes from the weakest to the strongest - he constantly says that the strongest people are the richest, most famous, and most lusted after. In the real world, just because someone is powerful does not mean they will be loved. At best this guy is a benevolent robot, and would be loved at most about as much as the A-10 Warthog is. There is no character development, at the beginning he wishes he was stronger and at the end he wishes he was stronger. His primary motivation is supposedly paying medical bills for his mother, but I don't think we ever get a flashback for the entire series, and there's no hospital visit until volume 3, and the mother is a generic prop that we never know anything about. The main character never suffers, and that means the book is lacking the suffering of a boy with a sick mom.
This book suffers from the Superman conundrum: How do you make Superman interesting when you know he can never be hurt and certainly never die? The plot follows the exact arc of the nearly universally praised One Punch Man - this is not a coincidence, it's a borderline rip off. The One Punch Man take on the Superman conundrum worked, so this book does too.
I don't think later volumes of this series are on Goodreads (I believe there are 5), but I got most of the way through the series before giving up. I felt like we just kept going around on the merry-go-round, and I got off on what I assume was the end of the second to last round. I didn't want to go through another 6 hours to see the same thing again, but this time with a stronger boss monster after what little mystery there was had been solved, but unsatisfactorily with hand waving away the parts of the system that didn't fit the resolution.
It's a mess, but it's fine. With a decent editor and a year of revisions it could make a fine series. I thought I might give it one star, but that would be too harsh. It was actually surprisingly good fiction to read for 20 minutes to put me to sleep during the 6ish weeks I read it consistently for. I could shut my brain off while I was reading it, but it was imaginative enough that it transitioned me into sleep. There were even a couple of parts that I read during the day because I cared about the plot; however, Judging the series as a whole finds so many problems, only some of them mentioned here.
If you want great progression fantasy I would suggest the Cradle series by Will Wight.