Just remember bad news sells. I'm reasonably sure there are a number of other cases where this happens, likely most. However they are not big news and not memorable so I can't cite them.
Certainly I'm able to think of plenty of terrible results from private equity take-overs from my own personal experience as an employee or as a customer.
And as a quick edit: none of these examples I have were of failing businesses. Each of the owners had their reasons, but none was due to it being necessary for survival. PE on hackernews tends to focus on software/bigger purchases, but so much of the damage in my opinion is on the local and smaller scale.
Let's say you make an app for first responders. Being a former first responder, you know exactly what your users need and what the workflows should be like. Your app becomes a brand name in the community. You charge enough to survive (if that), because your app is a labour of love more than anything else.
Eventually, family and other responsibilities get in the way, and you just no longer have the time or motivation to maintain the app any more. You sell to "we so swear we are not private equity" Applause.
As soon as you do that, the app gets taken over by financiers and developers who are experts at "revenue optimization", with little domain knowledge about what first responders need. They calculate (probably correctly) that they can milk their customers for a lot more if they move to a subscription plan, gate some features behind expensive premium packages, stuff the app full of upsell pop-ups and fill it with analytics SDKs that tell them which features are worth spending development time on, and which can safely be removed.
The Applause thing is absolutely real though.
As a public, well-known example, Dell being taken private in 2013 seemed to work out.
e.g. simply keeping the company afloat via PE cash.
If I recall correctly, this is what happened to Hilton Hotels. They were collapsing during the housing crisis.
A slightly different scenario but Hertz is a PE success story. It was owned by Ford and bought by a private equity firm. Now it's a standalone company making mint.
Most enshittification I am familiar with is because I read it in the news, therefore if non-shittification does happen it is likely I do not hear about it. I suppose the same holds true for other people.
If you were correct and people just had to hear about it then people wouldn't go around worrying about violent crime, because of always seeing on the news, despite it having fallen to historic lows. Instead people should be just walking around talking about how safe and non-violent the streets are nowadays.