Why the rating so low

Prob cus its new, usually they start with an 8._ rating

Its been up less than a day. Also a 8.8 of 10 is not bad because almost no work has a 10, if you see the ratings 65% of people give it 5 stars and and 24% give it 4 stars, so almost everyone who read it liked it
If you think about it the strange part is that this manga with one chapter that still don’t have any plot development has a 8.8 already