I think this comes down to priorities. $100k is a big number to graduate with and a huge burden. Yeah that sucks, but in 2008 there was a deluge of information in the media regarding personal finance. Everybody with any amount of debt knew what needed to be done. The financial crisis was not the author's fault, but the decision to spend 10 years effectively ignoring his debt is. Even after 1 year of making minimum payments you have to look at the result and prioritize a change... if financial security is truly important to you.
Instead, this guy chose to borrow from his future at whatever rate he's paying. Now, 10 years later, he's decided that wasn't a good choice and decides to reinforce the millennial stereotype of shirking responsibility by blaming the "shadow banking system" for his financial situation. I understand the appeal of living in a cosmopolitan city, working as a journalist, covering the fashion industry, etc. but that lifestyle comes at a cost. The cost for him is $100k at a "disgracefully high interest rate".
I think the author is willfully ignoring an important part of being an adult: personal finance. I'd say in 2008 his situation is mostly not his fault. In 2018 it's completely his fault. He had 10 years to adjust his lifestyle and chose not to.