I think a 3.0 first semester freshman year, in the middle of a pandemic, in a difficult major is a perfectly fine GPA. Does she really not want to continue in CS or is she worried about her GPA? I’d recommend she sit down with her advisor and try to get some perspective around her grades and path forward.
I think the bigger issue is that your D feels there is an intense stress culture, not her GPA. I’d have her do a deeper dive on if that would be any different in another major. If not, hopefully she can get her GPA up second semester and start putting in transfer applications. She should talk to current students at the other schools she’s considering transferring to to make sure she’s not trading one stressful environment for another. CS/ECE is tough everywhere and I’m not entirely sure she’d have a different experience at a peer school. She may want to look a tier down, both for mental health and because of her current GPA.