For example, if I'm feeling stressed/anxious, I'll scroll/browse/distract myself to avoid the negative feelings. I'm not seeking them like doom scrolling says.
But that is exactly how I expect a dictionary definition of a relatively new and tonally ambiguous term to present itself.
The difference I see with the example you give is that “Dirty laundry” is a metaphor, not a definition of a phenomenon.
I think the proper definition for doom scrolling has been mentioned multiple times by others in this thread and it would be something like:
Rapid consumption of mobile short form content for extended periods of time, often with no end goal in mind.
Others have done better than me, but that’s my two cents.