Rocket Full Stack Software Engineer interview questions

A coding challenge no HackerRank which involved two questions. I was told by the company that the phone screen would be language-independent and more concentrated on programming fundamentals. But surprise! surprise! The first question I was fired upon was "rate your proficiency in the languages you mentioned in your resume on a scale of 1 to 10" and everything that followed was keywords, ways to do things in Angular or TypeScript or JavaScript. I quote from their email "We want to hire engineers, not language specialists. Therefore, we’re more focused on where you stand on programming fundamentals, including common data types, design patterns, and data structures; object-oriented design principals; experience with unit testing; modern version control flows; functional programming; and comfort level on the command line." But yeah looks like they are in fact hiring language experts who knows practically everything on a particular language. Could move this position from entry-level to mid-senior level as well and change the position to front-end developer. Really disappointed for having wasted my time on this.