Aerotek Mechanical Engineer interview questions

I did a thirty minute interview with an HR recruiter about my work and academic history. There were not any technical questions or specifications about the role. It was mostly just a meet and greet.

I've had multiple recruiters reach out to me for different engineering jobs and they've all been very disappointing. The recruiter will go MIA after multiple screening interviews and promising to move on to the next step, having in-person interview with the hiring company. They would tell me they will get back to me with a date asap, spam my phone and email until they get a response from me (although I was at work so couldn't answer as much) but NEVER pick up when I call to ask what happened to that interview date. Truly disappointing and unprofessional.