Some suits at Atlantic are probably pissed at whatever money they lost from the song leaking early due to deals with other companies for digital or physical distribution rights. Are they right to be? Probably. They probably got paid or paid out for exclusivity or something. And, now that the song is out in the wild, some suits at some other companies are probably suing for breach of duties about piracy. As it is, some people won't bother buying it from iTunes/Spotify/Amazon/etc. They will try any way they can to find out who did it to please the parties involved so they can say it will never happen again -- or they may not be able to strike deals with those parties in the future on risk of lost money.
What money lost? It's probably mostly artificial: some clause probably said they owe money if it gets leaked; someone will probably cancel their contract due to lack of trust; lost sales due to "piracy"; they are no longer among the "exclusive" distributors, etc.
Someone correct me if I'm wrong; do I have all that right?
And do I ultimately feel bad for the label? No. Probably none of this puts money into the artist's hands, just the people at the label, and these kinds of deals are never what the customer wants anyway.