I agree with most of the comments made here. I've always been a C student and understand what it feels like to be the "least knowledgeable person" in the room.
You really shouldn't focus so much of your time and energy thinking about your co-workers. This company clearly has a bad culture and it shows.
It's a good thing that you realize your weaknesses. Take some time off to truly understand what is it that you want in your career. Focus on things you are actually good at, and then figure out how to intersect those things with your career interests. Good Luck :)
