There is massive oversupply of psychologists compared with available jobs. Universities churn out thousands of psych graduates every year. There are not thousands of jobs. Most professional psychology jobs require postgrad of some kind (clinical, educational, occupational, academic PhD) and these are extremely competitive to get onto.
If you do a psychology degree, you should 100% be prepared to end up in a non-psychology career. In terms of employability compared to other degrees, IMO it sits below STEM subjects, economics, and law, and above arts and humanities subjects. Kind of on a par with other social sciences and biology.
Having said that, psychology gives you good training in scientific methodology and statistics, which are useful in careers and life.