Edit : looks like it's piking up pace again (ch 170+-).
The first part is engaging and coherent, even though the MC is portrayed as simple and a bit crazy. The plot happening all around him is constantly advancing and explained, along with all the conspiracies and lore. Most of the questions are answered before the end of the first part and not given to us on a silver platter as most shounens do, so you can enjoy the MC's simple, crazy journey towards a better life along with the development of the rest of the main cast and Makima's plan.
On the other hand, the second part is not going so well... The old MC is in the spotlight too much, so the story is moving slower. The most disappointing part is how the old MC has barely matured. I mean, I didn't expect a 360º, but him still being extremely poor and still having the emotional intelligence of a toddler is nonsense. At the very least, not actively working toward his objective is disappointing; he's completely passive and even duller than in the first part.
I mean, his objective was to have a normal life and a gf, you'd expect that after experiencing some romance and a brutal treason that killed all his friends, he'd be slightly weary and not as eager to get any random girl as her gf. There is no reason for the country not to give him money and "actively" look after him
Edit (rant about part 2):
I'm just dropping it until the second part ends. Male MC's fight is no different from his initial fights; with this, they've undone all of Denjin's progress in every way. In Fire punch the author really managed to keep the tension even after the characters had reached their peak in power. But in the second part, they could've introduced a character to fill in Dejin's role (they just use him to keep readers interested since the author/editor wasn't confident in a female MC?). They could've also started the story before part1's ending; that would give the new MC room to grow or at least change her setting (Denjin started as a yakuza handyman or weak devilhunter before getting his powers). I mean, they're pitting her (a girl bad at sports) against the final bosses just after getting powers...
(-1)
(+11)
