STOP BUYING THEIR MUSIC!
Stop downloading their music.
Ignore their entire existence.
I don't care if you /like/ it. If you buy it or download it, you are giving them monetary and mindshare resources to continue to punish their customers and act improperly.
When they are penniless, perhaps they will see the error of their ways. Probably not, but then no one will give a fuck about them any more, and they can do no more harm.
In short, STOP feeding the monster.
INSTEAD, buy/download music from GOOD actors in the market. Support them in spite of the BAD actors. Support the artists directly. Never support any labels unless they eschew being part of organizations like RIAA and ASCAP.
I have done this for over twenty years. I am very happy with the music that is available to me, and also very happy that I don't support the bad actors in any way, shape or form. Indeed, I do all I can to put them out of business.
You can do it, too. ALL of you.
Take a stand. Make a difference.