I fucking hate nontarget schools

I go to a nontarget school. I know what I was signing up for, I didn't go to Stern because I'm fucking broke like I get it. But jesus christ the level of incompetence with some people. I'm just trying to pass my classes, and I know that I'm smart but I can't delegate work for shit because for one of my finance classes my "teammate" determined that Capex was apart of COGS. This is the only start of the problem. He has done this shit so many fucking times I'm just considering leaving this group all together. I have had to get everything done and i'm constantly fucking over my expectations by trusting these people. This is a SENIOR LEVEL COURSE. I want to jump off a bridge, I'm constantly trying to be the best I possibly can be but every single class they're trying to group us up for projects and its just filled with such mediocrity. I know this is pretentious but I can't stand it anymore because they're pulling down my GPA. I had plans for the future, but my grades have already dropped to like a 3.7, and I'm expecting them to be down to a 3.6 this semester because of all of this fucking group work. I already have the full time offer for a bank, which is cool and all. I never wanted to go to blackstone or anything but I'm just so frustrated that all of my hard work is going down the fucking drain because I grew up poor and had to go to such a shit school. No wonder I'm one of five people who has ever gone into banking from it.
I'm having a mental breakdown because what the fuck am I even supposed to do?? I know I'm not the smartest or god's gift to the earth but I feel like I'm doing everyone's work on top of my own, while still trying to help my parents get out of fucking debt while I drown in it. Rant over.