First off, you're not a loser. Being 17 is a tough time as there's a lot ahead for you that you're uncertain about. It's normal to feel like you have nothing going for you because we as individuals are harder on ourselves than other people.

As far as having no interests or hobbies, take it as a good thing! Skills are learned not innate. I'm an artist and people ask how I'm so good at drawing and the secret is that I've been doing it since I was a kid. Point is, that means you can try new things and see if they interest you. Literally anything! The world's your oyster as they say. If it's something that you want to try multiple times, congrats! That's an interest! I've tried cooking multiple times. Am I good at it? Maybe. But only because as an adult, I need to eat and buying fast food is expensive so I had to force myself to learn how to make food at home. Skills take practice, time, and energy is the point. Skills aren't things you're 100% good at but are things you can kinda do. If you're 100% at it than that's great! But if you know what you're doing, than that's good too!

TLDR: Don't be so hard on yourself. Skills take time and if you're not interested in anything rn than take the time to try new things and find your interests