Fast reviev: Good start. Nice temo. No hitting eye CGI. Many battles. Sigma main protagonist. We can say that its kind of city builder like in "slime" Not typical isekai, i would said its more like "the beginning after the end" kind one(i mean the world where our main character came from). Main hero just entire series farm all abilities, where 99% was uselles and even anime skip thoes xD Kinda mix of 2 series: "slime" and "I Get Stronger the More I Eat"Mid to end part of series kinda boring.
End mid.

In conclusion
Would be 8 if mid or end part was better.