What style of music were you making? I suspect, and this goes for more than just the music industry, that it helps if you're a natural self-promoter.
Having to self-promote is the main struggle, and that's the only way to "make it" anymore. Similar with the book publishing industry. My wife spent a year writing an amazing book, paying an editor, but when shopping it around to publishers, none of them would bite because she didn't already have a social media following. They expect you to have 20k followers knowing that X percent of those will buy the product.