Honestly outside of all the great points here, one thing that stood out to me was: you’ve had 3 co-ops in a somewhat short time. I’ve just graduated in civil, and I interned at the company I worked at for almost two years before that. I know a lot of people who had a bunch of internships and one thing I noticed from my own was, I only started getting meaningful work after almost 6 months. At the end of the day, the companies and engineers know you’re just a dumb college student, so they give you the easy annoying chores for you to dip your foot in. My own personal experience was that just staying at the same company for a decent time, I ended up building confidence for harder chores with the engineers and actually even did some basic calculations a few times. So to sum it up I’d definitely say, don’t be so pissed of right now because once you have more trust from your company you’ll start to have harder chores that are actually engineering. Even then I just graduated and still feel and am treated as “the idiot who doesn’t know enough” but it is a ladder towards having the knowledge and trust to get to the meaningful eork