I think you need to start pulling this together. Considering the low gpa, a business, coding, and language study are not sufficient to pull you over the hill. The issue now is not what more competitions. It’s learning about the targets’ values (which are much more than some mission statement,) lining yourself against that, seeing how you match, and how you might improve your shot. Can’t do that without starting with the due diligence. That includes checking where you fall in the stats range of those for admits or freshmen. And it’s what the college says and shows.
By looking to increase your EC involvement, you’re could very well cause the adcoms to further wonder if your priorities are in the right place. You don’t seem to be focusing on how you might, armed with better knowledge, be able to create a picture of yourself that softens the reality of the academic performance- how to frame your app to your advantage, investigating what’s possible. That’s not more focus on ECs.