Physics turned me from a physics heavy major to a chemistry heavy one.
I remember freshman/sophomore physics frequently turned off a lot of freshman and sophomore engineering majors.
At quite a number of universities, the freshman/sophomore physics sequence of courses were used as "weed out" courses to kick out as many engineering majors as possible. Especially after the first course on classical mechanics. The second (or third) course on electricity and magnetism further "thinned out the herd".