Right there with you- as a current UW student who briefly considered CSE I decided against it because the mentality (the vibe, even) of the department clashed against my startup aspirations and the learning mindset necessary for creating a startup.
I was instead drawn to the Informatics program, which is less technical but provides a much better environment for entrepreneurship: we trade project management, information organization, and a web design/development focus for computer science theory and engineering.
A tragic design/planning flaw of UW is that the engineering departments are on the opposite side of campus (~8 minute walk) from the business school. Collaboration is isolated and leaves little serendipitous idea exchanges that could very well develop into potent startups. I can only imagine how things might be different if UW had made the two neighbors...