Disagree. It's not a website, but a portfolio. Agencies and designers have to show off what they can do and a static site with screenshots won't cut it. I'm personally very impressed.

All the more reason to have a good user experience. How likely am I to work with an agency that can't even show me their work in a functional way? Scroll is broken, navigations are broken, weird looping behavior. It feels like an old Dreamweaver site.

Agree that it's a generally different use case, but I'm trying to click through to examples of work and I went through three or four times to what seemed a blank page, returned to the homepage, and started over, before figuring out how to access them.

There are still slight UX requirements even for showy contexts like this.