Corrupted mob boss? 
isnât mob already an illegal thing?
Mob is an illegal group of criminal people doing illegal business and never paying taxes. Why should one criminal group wanna make a honest move and fight against another criminal group just because itâs corrupted? All mobsters are against authorities anyways. Make them fight over other things than corruption cause it doesnât sound right. You should probably make them fight over a thing that is relatable to all readers including 13,14 y/o. One of the options could be love of course but there also could be revenge/trying to âremoveâ certain people/trying to become clean and start a honest life/co-operating with authorities/etc