I made a previous post about withdrawing from Calculus 3 because it was not required for my majors I want to transfer to and I am currently performing poorly (Cognitive Science @ UCSD and CS TAG @ UCI), but would it be bad to have 3 consecutive semesters with a W in them? I’ve dropped Physics in Spring, DiffEQ in the Summer, and now I want to drop Calc 3 this fall. My only reasoning for dropping them was because I was struggling with each of these classes (I utilized many resources to help me), and they also are not required for my majors. I’m also worried if I explain my W’s this way on the UC App that it’ll look bad too 
It won’t look great that you withdraw when challenged by difficult courses, so just don’t do it again.
Just say you wanted to put focus on other classes.
Do you work? That may help too