I mainly use Chrome, and in their newest M121 release they made not one, but three major UI changes and I hate every single one of them.
For the curious, they are (together with my rant):
1. the new "simplified" bookmark save flow which is more complicated than the old one;
2. loss of the ability to disable system notification (i.e. to use Chrome's built-in one, which I prefer);
3. loss of the ability to disable "copy to highlight" context menu option via a command line argument, which I never use and it just messes up my muscle memory for right click -> copy.*
* Seriously, why is it so tough for software in the CURRENT YEAR to just offer fully customizable context menus? How hard is that? Funnily enough, this used to be a staple feature in nearly all the popular freeware back in the 2000s and 2010s. It feels like the whole UI/UX scene has taken a nosedive lately.