Not at all. You just haven't found something you like to do yet but once you do, you'll excel in it. You definitely are not a failure here at all but its good you are at least trying everything which is more than most do. Just keep an open mind and heart here and you'll find your calling soon and also quit thinking of yourself as a failure.
You'd be more of a failure if you didn't even try different things. Have fun and get out there and experience more adventures. Good luck
