Transfer for environmental engineering?

Hello! I’m currently a freshman at Ucsd accepted into the environmental systems program. I’m trying to get into environmental engineering but I feel I have a low chance of getting accepted as that major since it’s so impacted and my gpa isn’t too great right now (below 3.0). So I was wondering if it would be a good idea to stick it out with the major I have now or transfer elsewhere to a lower ranked school where I would have a higher chance of being accepted. Ty!

Are there significantly different outcomes for the two majors?