It depends. If you’re applying to pretty selective colleges with low transfer rates, yes, undecided is probably going to hurt you. They need to know why you want to be there and it almost goes without saying that if you’re undecided, you aren’t sure why you need to be somewhere besides your current school.
If you aren’t aiming super high, it should be relatively easy to transfer, but it will mostly depend on your GPA.
Why do you want to leave your current school? Surely it offers other majors besides sciences?
Edit: I see you already have started a thread on this which has relevant information. Transfer Chance Me Fall 2023 or Spring 2024 - #4 by zeldogan