Just about every Big Star in Hollywood, with a small handful of exceptions- have been considered “difficult to work with”. The stars of Justice League are no exception, male or female.
Here is one list of the Top 20. About half are male, half female. You seem to be claiming that the females on this list are really all angels, but just refused to sleep with the bosses. While the males are on that list as they are really assholes. Unless you think Shia LeBeouf is on that list as he refused to sleep with Micheal Bay. 
Divas have been Divaing since Og was drumming and Meg was singing. Actors, singers, musicians, writers, sport stars, etc. Fame does go to your head.
Now what i said above was that Gadot was sometimes considered “difficult to work with” but not exceptionally so. She can be googled and stories found but she isnt on any Top 20 list or anything.
Here are some more lists
https://screenrant.com/difficult-actors-nobody-wants-to-work-with/