I've read otherwise but couldn't find anything with a couple min free time. Anyone else read/know about this?

That would be marvellous.

They didn't down rank it, they delisted it just like they would delist child porn or copyright material after receiving a dmca notice

They de-indexed the domain. I think they do do this on an individual basis from time to time, especially with sites distributing (links to) illegally obtained content.

I just added a screenshot from search console: https://dejanseo.com.au/competitor-hack/

There's no manual penalty notice.