Ask HN: How do I contact UX at Dropbox?

Today I needed to get a PDF from the web interface. Last time I used the Dropbox web interface was back in 2010. I want to download a PDF. I click on it and it opens. I scour the page for a download button. Cannot find it. I see on the sidebar "Share \/" I click "\/" nothing. I see "Open \/" and I click "\/" and it has one item called "connected apps". After looking around I finally find a button with 3 dots "..." I click on it and it has a link to "Download".

I estimate ~5 minutes to locate the download button. I think to myself that I should leave Dropbox a note about this. I would think "Download" is a critical feature that should be front and center. So I try to find a contact or feedback form. Nothing. I google "contact dropbox" and find the only options are to talk to a bot or write a forum post.

So my question how can I contact an actual UX person at Dropbox to commend them on how awesome the web UX is!