Yeah... the story starts great, it's a fanfic where the MC is a Mary Sue, so of course she's gonna be gifted at pretty much everything, from archery to martial arts, to business management and engineering, but at least they have a reason for it, it's not the greatest reason, but it can work.
Also, she does take 6 months of training at the beginning and only becomes a match for catwoman, Batman can still beat her, which is more time than many such fanfics can say about their MC's.
So, all in all, about 40 or 50 enjoyable chapters, not the greatest thing in the world, but good.
Then we get to the Gotham arc and things change. EVERY, SINGLE. CHARACTER, seems to be fighting to hold the idiot ball.
The author wanted the MC to solve problems so, every time there's a problem, no mater what, the MC is the one that will solve it, no matter where she, how long it takes, or how stupid the other characters have to be for her to solve.
THe story tries to use humor to mask everyone's incompetency around the MC, but it doesn't land very well with me.
People being stupid once or twice so the MC can look good I can stand, doing it every single chapter for more than 50 chapters is a little too much.
In short, the MC is the greatest, she's a prodigy in anithing she tries and, to make her look good, whenever people are around her, their skills and IQ go down by 50% or more... it's almost like she has a debuff aura or something.