I think you made the right choice. I live in Madison and have some friends and coworkers who work or have worked for Epic. The burnout is epic (pun definitely intended).
I think the only ones who really like their jobs are a barista and a cook.
I really enjoyed my time there actually. There's a decent burnout rate for some teams and roles (especially for ones that travel a lot), but there are some groups there that do interesting work. I was one of their Security team leads for a year or so right before I left and had a lot of fun with it.
Yeah, that lines up with what I heard from other people that had worked there, or knew people that work there.
For all of the flaws though, they had a fantastic and cheap cafeteria. It's surrounded by cow farms, though, so they have to have some sort of meal accommodation.
I think the only ones who really like their jobs are a barista and a cook.