“The thing that bothers me is that I didn’t even get a phone screen. I didn’t even talk to a recruiter over the phone. After all this work and enthusiasm, I didn’t even get a chance to prove myself.”

I felt exactly the same way a few months ago when this happened. But, different from you, I did realize my mistake. If you want to know more, check out my blog: https://medium.com/@minhhoang_50731/landing-first-internship-2e27d0163d3e

I hope it would help.