All the psychology classes I took were full of evolution and kefira – I’m not saying that means it’s assur to go to college if you need to, but it’s not something to take lightly and it should only be done if necessary. Personally, I am very grateful that I didn’t go to a secular college when I was younger and am only going now when I’m older, so it’s much less problematic, although still an issue.
It is a problem when people just assume that it’s totally fine to go to college instead of realizing that it’s b’dieved, and much thought has to go into it before deciding to go, and even once one decides to go, they must put a lot of thought into what they will study and where and how.
If you do go to college, it’s very important to maintain a kesher with a Rav and make sure you have a strong learning schedule (whether you are male or female) and a good support system. It’s also preferable to have a few steady years of learning Torah under your belt before you start college.