This. Recently came back to macOS after a decade on the other side, and one surprise was how terrible the official Dropbox client was. Installed Maestral instead and it just works -- just like Dropbox used to.

<begin rant>I see Dropbox as one of the biggest failures of the VC model. If only they had been bootstrapped, they would probably have stuck with their initial sync offering: A perfectly executed solution to a problem everybody has. And a small team could have made a good living here -- even with reasonably priced non-free options. Instead I imagine some VC partner convinced them to "grow their market" (or maybe "prepare for cloud"), and now they are descending into irrelevance. <end rant>