They keep popping up. The stupid trends that do something the stupid way which used to be done the smart way and everybody jumps on the idea.
Examples from movie-making would be immersion-breaking circular explosion pressure waves and lens flares.
One of the more recent web design trends is to make avatar pictures worse. (There is no English word for Verschlimmbesserung, the act of changing something to make it worse.)
Picture files are rectangular. Web design is profoundly rectangle-based, and for a good reason. It makes efficient use of screen space. Now you create your avatar picture for a web service, cut it so that it includes what you want to see, upload it, and then the web service just cuts off a good bit of the picture all around, thus wasting all the space that has been cut off, since there’s no use for the free space around a circular web element like that anyway. Your whole avatar now looks like it has been squeezed into a balloon, with no advantage, only downsides. Why? Because some marketing-drunk fools think rectangles are so last year?
The world is going crazy. I see the process at work every day.