Help: Would dropping this class effect my chances of graduating/ transferring

Long story short I have this professor that makes things more difficult than they should be, and is unclear on assignments. She doesn’t post grades and I’ve calculated my grade at a 75% just from the weight of assignments and what she’s given back. My tag was approved for Davis which I know will be voided if I drop, and I just emailed them yesterday about if dropping the course would it effect my chances of getting in through the regular admission process. All they said was if I dropped the course I would still be above the unit minimum. I should add that I need this course to fulfill IGETC requirements and graduate from my cc