Like all of this type of manga the story has become boring and directionless - and like always I am hoping despite better judgement that a character stronger than the MC appears and whoops his ass completely.
As with all art, all art is quite useless. The value of art is subjective to the eye of the reader and its admirers. This manga from the outset was meant to be about a neet iseikai'd trying to live a laid-back comfy life in a comedy setting. The only thing that's serious for the MC is about taking care of and making life fun for his younger adoptive/step-sister.
From the title of the manga, you can pretty much be assured our MC is already the most powerful in this world... And the only time(s) our MC is going to get his ass kicked is in the intelligence (average IQ) and low wisdom (no foresight) stat. Our MC is basically like saitama/mob, but the cast of characters around them are nowhere as deep, driven, nor serious.