[eshvk]

It is not clear to me how your citizenship or lack of it has to do with your internship prospects. From an immigration point of view, assuming you are legally in the country, there is literally nothing that any company has to do extra to hire you as an intern. It could simply be that that specific company was being stupid.

I have been in the same situation you were some years back. No C.S. experience; I had just moved from an EE background to work on Machine Learning. I was at an incredibly good school but still getting an internship seemed atrociously hard. Especially considering that people who had a C.S. background were not being grilled that hard in interviews. The problem is social proof. At the moment, you have a severe lack of social proof. Maybe, it is your school; maybe it is a question of abilities. It doesn't matter. Stop overthinking about things that are out of your control.

The solution? It may seem futile or simple but just keep going. Take concrete steps. Do more networking (which you are already doing), do prepare more for interviews (the standard algorithm/datastructure prep), rebuild your resume (feel free to ping me or post your resume on this thread and someone can critique it). Also, it is not the end of the day if you can't get an internship. It is one way to getting a full time job _but not the only way_. You can do other things: Google Summer of Code, hack on open source projects (which you should start doing yesterday, an excellent way of acquiring social proof), working on research projects with Professors (high profile ones that have good industry connections).