What's missing in your description is the timeline. Note that the term was first introduced by Sean Ellis in 2010, and according to Google Trends it peaked in usage in 2014. At some point (2014?), it became a buzzword and suddenly every marketer started using it. So in 2021, when someone puts "Growth Hacker" on their resume, you draw a very different mental picture than you did in 2010. Is it fair to put the 2010-people into the same bucket as the 2021-people? I have no idea when and why Austen was using this term. But calling him underhanded for that reason alone comes across as biased.
Btw, "growth hacker" is not the only term whose perception changed throughout its lifetime. Here's a fun one: PHP. Actually, many other technologies suffer the same fate (Java, Rails, etc). Sort of related: NoSQL.
Prediction for a future liability term: AI (what are the chances that in 2030 people will feel about it the same way they feel about it today?).
