You can unlike things, you know. You can also mute things.
But recently, crap app of the day pops up, a few people share it, I ask them to hide all from that app, and I see it again the next day or so. The cynic in me thinks they might be doing some kind of test to see how long they actually need to hide something before it can be dropped back into the timeline, instead of just hiding it like I asked.
Then, what would be on my feed?
No I'm clear that you can but it's still a lot of effort that isn't worth the lack luster content that still remains.
Once you have unsubscribed, your newsfeed will be wonderfully straightforward. After a few days it will be cluttered with sponsored likes. I assume this is however long the batch process takes to catch up.
I only go on Facebook to respond to invites at this point. I stopped going on because their mobile app is literally the worst software I've ever installed on my phone though. It's huge and bloated, and it doesn't even include messaging, which they broke out to another app for god-knows-what reason.
Guess what was advertised in my feed later that day?
Note: I hadn't so much as googled Roombas before this - it was a totally off hand remark during a call.
And at that point I'm not really sure it's a problem with facebook, or a problem at all, but moreso you not being the target user.