So as the other reviews noted, it's wayyyy too easygoing/lame/naive, etc. Which by itself wouldn't be too bad: there's entire genres about 'isekai slow life' and stuff like that. Just being a happy world working on farming or gardening isn't a bad thing per se, it definitely can have it's own charm.

However, the author decided to make the world 'realistic' and have villains and evil people and ... you know, a semi normal setting? So combine the two genres and it drastically clashes all the time. In recent chapters we have a super idealistic prince who's just as soft and naive as the MC, and the ONLY reason things don't end in disaster (rap*, slavery, execution) is because the MC uses his storybook writing powers to save everyone. So it's not just the MC like that, but a few others. Honestly, if the author had just made it more like the 'slow life' series (plural), then the MC would've fit right in, and it might have been enjoyable that way.

TL;DR. Super soft weak annoyingly fluffy happy characters in a world that doesn't suit it, so it just annoys all the readers and with plot holes galore.

It's not only that the writers want to stick to the "brown haired with glasses that's weak and kind" korean man trope, but that the writers want both the cultivation style adventure for the man while trying to convince the audience that the man wants to just be a quiet shopkeeper. he keeps being rewarded these cheat skills and using them, knowing he is changing the status quo of his world. yet we're supposed to believe he wants nothing to do with the strong players of the world? ridiculous.

Don't let the cute art fool you. It's not even a SoL.

Easygoing quickly turned to ignorant, naïve, denying and underestimating themselves.
They also don't seem to know, care or try to find out what's going on, not much surprise or acceptance either, just apparent ignorance. Other characters are also shown as ridiculous, letting clear signs of MC being special just ignored or dismissed.

Additionally, Constant new functions / aspects with no explanations turned the plot into a mess.

With both the main character(s) and plot being bad, there's no point in reading the series.