It is an idiom : http://idioms.thefreedictionary.com/tear+apart
You can usually tell that someone means they are tearing something apart figuratively (not literally), based on the context. For example, you know that the resume checker didn't physically tear your resume apart because she gave you the compliment that "..your resume is pretty good".
It is similar to saying that she "dissected" your resume, which would mean that she cut it apart with a knife and analyzed it methodically. You know she didn't actually do that.
When she says "I guess I am in a way", she means that she is suggesting very extensive edits to your resume which are semantically/logically equivalent to physically ripping it apart.