No the spammy results are when I search for something on google, it gives me a Pinterest link that matches my search term exactly, the link has absolutely nothing to do with what I was actually searching for and if you click onto it, you're met with a page full of random Pinterest crap for about 3 seconds before it busts out a signup wall in your face and to top it off it'll take you at least 5 clicks of the back button to actually get off the page. I find it happens a lot searching for tutorials for things.
ETA: to address the original question, I find quora annoying, but a lot less than Pinterest. I actually do get decent results when I can view a page. It just seems to be random whether it throws an account wall up or not. I find copying and pasting a link to a related question into a new tab will sometimes work if I close the original tab first, but not always.
So on what planet is Pinterest the bad guy, here? Because they didn't completely knee-cap their traffic because Google was too preoccupied to work with them on this issue? No. It's just a popular opinion to hate on Pinterest on HN and people like Google so the facts don't matter.
As far as the signup wall goes, well, that's on Google too. They could stop indexing sites that require registration at any point after clicking through. Goodbye Quora, goodbye Pinterest, goodbye New York Times.
The spammy results problem is super easy to solve from Pinterest's side. Just make pages full of images non-indexable and provide simple pages with one single image and there will be no more spammy results.
By "easy" I mean technically. Pinterest is a scummy company and I doubt they'd lift a finger to make things better for the web and its users.
I am very confused by your argument.
Instead of fixing the structure of their goddamn website, they wanted Google to give them special treatment.
Btw, I agree with you however that Google serving garbage results was 100% Google's fault, though.