Windows 10: Overly aggressive telemetry nonsense running in the background that needs killed after utilizing 100 percent of a disk's activity and slowing actual working tasks to a crawl. In Microsoft's sick version of humor, they refer to this process as something that improves "Customer Experience".
MacOS: Similarly aggressive nonsense running in the background doing the exact same thing. Battled a quad core i7 brought to its knees this weekend and my decidedly wimpier Air gets the stuffing knocked out of it. The former went through a series of black screen/no cursor reboots after the latest round of updates. Had to pull every trick in the book to get it functional again.
Enterprise Linux: Decided that I was going to use 1024x768 and like it. I actually had to write a damned modeline to make it stop. Writing a modeline. In 2017. Ridiculous. Mind you - Nothing changed. No updates run. Nothing. It just has it's "whims".
Ubuntu: I didn't bother turning that machine on. It's a Core Duo Acer tower. Even if everything ran flawlessly, I had things to do in Android Studio and Android Studio on a Core Duo is ulcer inducing.
I really miss DOS.
DOS never gave me this shit. It just worked until it didn't. Power cycle machine. Clean slate. Off to the races again.