Instead of charging artists to use your service and annoying listeners with ads, you should start acting like a proper record label - finding the best artists on your platform and promoting them, providing a marketplace to sell music and merch, physical media distribution, arranging and promoting gigs, tours, festivals etc.
Why can't I still sell my music on Soundcloud? Why aren't there Soundcloud Festivals around the globe??
Soundcloud's killer feature has always been the incredible variety of content here. It's the place where most new music is born and sees the light of day. You're the first "record label" in history with millions of exclusive artists. Take advantage of that instead of squandering it all away - any traditional recording label would kill to be in this position. You should be the biggest record label on the planet by now (in terms of both number of artists and sales).
And yes, I am available for hire for your CEO spot.