With my account, Dropbox regularly (possibly on auto updates) ignore my Preferences setting and switch on their terrible user interface, rather than let me just use the Finder. I have to keep going in to their Preferences to turn it back off.
The worst thing they have done recently is when you install the client it has the default setting of backup your Desktop, Downloads and Documents folders. These tick boxes are also not that visible in the install process. It can break existing links that people have to their files! This so confuses newbies that they try and fix it by quitting dropbox, hacking away and then losing countless files. I can’t believe they have done this.
The install of the client also nags you to turn on SmartSync, which I hate and really doesn’t work well, even for those who need it, e.g. because of small drives. Their nag includes things like Not Enough Space for Local Storage Option, even when I know there is. If you persist, it does at least do it. Sigh.
Lots of other little things. Like you have to hunt around to find the beta that works with Apple Silicon (it does work fine).
Why does this sort of thing happen to every successful company?
Your message completely mirrors my experience with the current Dropbox app. DB used to be a focused, lithe tool. The current DB has become a heap of unwanted and intrusive functions. Even worse, functions are badly implemented giving rise to bugs and subpar performance. And don't think of contacting tech support. I made the mistake of contacting them when I experienced very slow sync (despite new system and 500 Mb/s connection). Totally useless stock responses. I have given up.