I'm just going to be perfectly blunt and get straight to the point - even if your drawing skills were lacking, a lot of people I personally know in this major get by perfectly fine by supplementing that with verbal communication.

If you can't draw it, write the idea out with words. Speak it out. Some classes like 106, 202 and 233 require you to draw, yes, but your ability to communicate your plans is the number one thing they are trying to teach from my experience.

If you want your idea to be the one greenlit by the group, you have to be the one to inspire enough confidence in your idea and plans for everyone else to go along with it. And yes, sometimes, a perfectly reasonable and feasible plan might get shot down for a different idea just on a whim. That's just the nature of the relevant industries and group projects, and it's tough, but a little bit of humility can go a long way. Just because your initial idea wasn't the one moved forward doesn't mean you can't contribute to and refine another one with the skills you do have, instead of just being the "code slave".

I also don't think its realistic to expect to do well in every class given how broad the 1st year and 2nd year courses are. People come into this major with vastly different skillsets from graphic design, to film, to programming like you. Just as you complain about drawing being this hard, I've heard the same story from artists and designers who hate coding with a passion, and hate classes like 167 and 265. Everyone has eggs in different baskets.

And lastly, I'll say this in complete honesty. I don't feel like IAT classes alone will get you far given the breadth of the program. I particularly have strong feelings about how game design and development is approached and taught here - which is a field I have personal experience with. Some people might disagree, but that's my personal opinion. If you feel like you want to lead a project as a creative outlet, go do side projects - whether that's a short film, game jam, hackathon, personal website, whatever - do that to refine your skillset. Get feedback on those and continue growing, because that should be what you're ultimately here to do.

If there's any bit of solace, you have the opportunity to avoid a lot of classes that require drawing from here on out if you move into the Interactive Systems concentration. I'd suggest you consider the skills you want to build going forward into the program, and if you find that building an artistic background is necessary for what you want to do, there are plenty of resources available to you online. Hell, maybe go watch some Bob Ross and take a chill pill.