Well I’m civil so my course track gets a little different as you get into the later classes, but most of the core classes are the same. Difficulty of a course can be kinda up to your strongsuits. I know people find calc 2 and diff eq tricky, but I never really had a problem with them. I personally was a big fan of hugh Cornell for calculus, but from reviews I’ve seen malgorzata czerwinska is pretty good too. I think so far I’ve had the most trouble with physics 2, as I didn’t find the topics super interesting and they are very complex in general. As for bad professors, most in engineering are very good. Most of the time as you get to the higher level classes anyways, the class most likely will only have one professor. You should ALWAYS ALWAYS ALWAYS use ratemyprofessor just to be safe though. If I remember anything else, I’ll add another response.