I hate that even though I paid for the service, the web version still has a banner ad asking me to upgrade. It's so stupid that the "share" button on mobile goes to dropbox's own share and "export" (Android's share and what I usually want) is buried deep in a menu. Also photos, the whole reason I got dropbox (to switch away from Google photos) is a terrible experience. The web photos page is awful, you can't see albums made on mobile and it's slow. Also I have a bug I can't fix where on desktop if photos are downloaded for offline, the thumbnails disappear.

It's frustrating that so many developers have taken such a strong mobile-first approach to the detriment of the desktop; especially something like Dropbox.