Primarily because CS is a massive meme we're all tired of hearing.
In my personal case every CS Major I ran into was full of cringe, autism, or both and tended to be an insufferable cunt. Basically felt that just because they were semi-ok at programming languages and were decent enough with computer hardware that a CS major was the perfect fit.
They also tend to be the most ugly fucks I've ever seen. Like the meme rings true or I just straight up am unlucky with the people I run into. Like every person of each major I run into fits the stereotype so perfectly.