Others have handle positive reviews for the series plenty adequately, so I will review the negative reviews here.
Potential spoilers in the last few sentences so read cautiously.
The negative reviews are mostly coming from salty males that probably didn't watch past the second episode they were so triggered. They want true history from a fictional animated series? Come on! You have to be kidding me! The kicker are the ones that critique the animation as they have no clue what good animation is. The one guy calling out transgenderd blah blah can't get past their hate to realize that is not at all what was going on at all. The MC kid had to hide their identity in every way possible. So yes, the series is awesome and the negative reviewers are clueless.