Don't get down about this, they must have hundreds of applicants for very few roles.
Lots of the time it can be down to frustrating things like they might be doing interviews as a courtesy as they already have someone in mind for the role, they legally have to advertise and interview for any position.

Can you put your showreel online if you haven't already, would love to see what you have. Getting the first job isn't about luck but it is about serendipity. Everything must fall into place.

Don't get disheartend, I had to go through a few phone books and contacts for a long time to get my job, it takes determination and perseverance. If you want to chat about options and what you can do to improve your chances give me a private messsage!