I personally disagree. While it is absolutely true that there is a lot of garbage content on Quora, it is certainly one of my favorite sites on the web because for all the garbage you come across, you can come across some wonderful gems and actual helpful people, and in general I find it pretty easy to just mentally filter the garbage out. That might be because I have spent a lot of time trawling through it and answering questions though.

And perhaps I just like quora so much because it's the only place on the web I've gotten any meaningful amount of impressions and engagement on content I've produced (aka answers), so perhaps I am sonewhat biased due to that. All that being said, I can certainly see why someone might find it annoying, but I think that if you take the time to engage with it and understand the ecosystem within it, it'll make it a lot more tolerable.

Or you can likely just follow what I assume will be a suggestion from other users here as to how to filter quora results out of your queries :)