Well i still didn't read this manga, but most of misfits students caused some physical harm to others (while maybe the one in this manga didn't?)
like in misfits, the one who likes games send 6? People to the hospital over a game, the big one with golden hair attacked a teacher and hurt him a little (cause he took him by surprise)
Asmodeus alice was close to harm a girl by his flames if it wasn't for Iruma saving her
jazz (i hope that his name?) kept steeling from any person walk past him,
the samurai boy (furry one) can't risk letting other students see his face or they might lose their sanity...

...why are they not in misfits? I mean if misfits are the most troublesome group that they need their own section named after them, what's there difference between those other troublesome kids?