it's not even about the monetisation part. imo it all went downhill when they started to allow incredibly low-quality content onto the site. I open my feed and it's filled with stuff like "what's your favorite food" "what scares you" "what are some common tech hacks etc. etc" it's incredibly annoying.
I'm still pretty hopeful about Quora and I think they can still turn this around as there's a sizeable population of subject experts on the website who keenly answer questions and share insights.
Quora's one of these counter-intuitive cases when a product could've been better off with a dozen or so people working on a shoestring budget instead of raising venture capital and trying to do 10 things at once as they in fact did.