Quite frankly, I'm on Junko side. Sure she stepped on people to get there, that just means she was clever enough to bend them that way. In the end of the day , she's still the one doing the dirty work. Kayo just getting everything handed to her like she got a sugar mama on the inside just shows she doesn't have what it takes to get there on her own. Like for that Luca guy, yes she got the info but she couldn't give the finishing blow by herself. The fact that she just gave Junko the USB was proof enough.
I'm not saying that Junko is a good person... But let's be honest the corporate world is just a big flock of Junkos getting away with walking on others and an horde of Kayos who got there by preferential treatment. So let them destroy each other. It's not often we get to see that top 1% smacking each other.