Dollar General interview questions

After a recruiter screen and a phone interview, I was asked to provide 3 days I'd be available for an on-site interview. I was then asked to come in on a day I said I would be unavailable... for a 5-6 hour interview. I had to take a day off work to accommodate this request. I was seated in a conference room and given a boxed lunch while different people came in and out of the room to ask questions. I was told I'd be notified either way in 1.5 weeks. After not hearing back for 2 weeks, I reached out to learn that they went with other candidates. I think it speaks volumes of a company to ask someone for an interview that long on a day they said they'd be unavailable and to not even get back to them. It felt pretty disrespectful and I'm glad I won't be working here.