Some of the students in your class might be faster learners, but they reached their current skill level as a result of ongoing practise and effort. No one is born knowing how to paint. If you want to improve your skill, work smarter and/or harder. Believing that others are more talented than you is self-defeating. It curbs effort and encourages dissatisfaction, making you doubt yourself and continually restart and chop and change themes (this is one of the 10 common mistakes made by Art students).
Somewhere in the world, there is always someone better. Take what you’ve got and build it into something great. Make the most of the high achievers you encounter: learn from them, emulate them and compete. Waste not a second on jealousy. No one has your exact background, ideas, techniques or approaches. You can make Art that no one else ever can. Rise to the challenge.