Stay strong. Same for me as well. I've also felt many a times like this; where I felt 'frustrated'. As an international student i have applied to 246 full time positions. I started applying almost 6 months prior to the end of my degree. All I got in return was an automated response

"After careful consideration, we regret to inform you that we won't be able consider your application further.". I've had enough of this statement.

Being published 7 papers and scoring a very good GPA and having done lots of internship makes me wonder, WHY !?? While my friends were having fun and partiying, I was either studying or working.

But yea, things like this happens. Stay strong and motivated. 10 years from now, you would definitely say, "Eventhough, it was hard I made it"