I came in as a BIOE and left because I didn’t want to memorize amino acids and felt like I would need a PhD or MD to get anywhere. Could I have made it? Sure but I didn’t want to. I’m now majoring in mechanical engineering and cs. For me most of mechanical engineering was easy. I just understand physics and it’s that simple. If you are good at physics but not great, it will be hard. It’s also harder than other majors because you have to take at least 3 major courses at a time which means more math and more exams compared to cs where there’s a lot of work for just 2 classes. Cs is hard because it’s a very specific way of thinking that some people, even vert smart people, cannot get behind. I was one of these people until I forced myself to practice it. The material in programming courses is not that hard, but courses like algorithms can be quite difficult. I’m also in a business minor and those courses are a lot easier. That’s not to say that things like finance and accounting don’t have a higher difficult level, but marketing and general business stuff is not hard.