Sounds like that company might not be the right fit for you, but I don't think it's fair to dismiss writing code "in that manner" if it's a job requirement, despite being an older technology. You'd just have to learn it if you wanted that job.
I feel like I'm in the minority because I actually like web forms, despite my recent work with MV*. It provides a convenient, encapsulated object/event model to very RAPIDLY deliver solutions for a certain lob class of applications.
Web forms allowed an entire generation of small/medium businesses to leverage their existing VB6 skills and enter the web space and for the companies I've worked for, they've been wildly successful. I had a non-technical boss tell me once that the only true measure of software quality is if the company is making money using it.