Big Order is simply put a very, very bad anime.
In all honesty, I wasn't expecting great things, but considering the premise seems pretty interesting I decided to check it out.
Don't get me wrong, I don't hate it, but I'm sick of 14 yo teens fighting and wanting to rule the world for a stupid reason.
Things that I like:
- opening is great
- animation is good
- Rin and Bunny girl are somehow enjoyable
Things I dislike:
-Everyone else is annoying
-Horrible made fanservice + censor
-Overpowered teens
-Full of cliches
-Incest (they aren't really brothers, but their relationship is cringy)
-10 episodes, I doubt this will have a good ending
-Some things doesn't make any sense
If you are a newcomer and you really like Mirai Nikki, Owari no Seraph etc. give it a try. Maybe you'll like this and that's okay, too.
If you want more mature and plausible things to entertain you don't watch it because it's poor made.