Just a note, something that happened to me that I found interesting:
Last July, after much back and forth with a crappy manager, I quit my job. The idea was I would find something quickly, but I ended up being unemployed for 3 months.
As this caused me to get behind on my mortgage I applied for a moratorium, so I could catch up, and they wanted a denial letter from unemployment. Well, I never applied. So I applied in October, and before I got an answer, I found a job. I expected a quick denial – I mean – I quit!
So forward to now, and I was laid off, should be easy enough to get my benefits, but no; because that old case was still pending.
So they finally got around to making a decision on it today: they approved it. In short, they decided that my managers personality “interfered with the work process”
TL/DR If you think you can’t get UI because you quit, apply anyways, because you may be eligible.