Yeah, several people from Steam including myself have put in help tickets to get this issue resolved. But Steam doesn't really seem to care. It looks like they have changed the client app to where demos can no longer be ignored, which means numerous demos you have no interest in will just sit out there. Pages and pages of them that can no longer be ignored. Perhaps Steam is thinking that if we can no longer ignore demos then we might give them a try, which I won't. This has completely changed the way I search the Steam store because I've had to stop searching demos.

I'm using the browser, the client is modded to kill the store so I can't see anything there, not sure about mobile cause I can't debloat it and I only launch the app once in a forever when I have to sign up back on the browser.

They need to add an opt in or opt out option, cause I have no plans to touch any kind of demo and I want them gone from the shop.

What the heck is the point of not allowing us to ignore demos?
It will be a cluster F, to wade through stuff that I don't want to see.