Yeah the obvious answer to software getting worse is to switch to FOSS. Use Linux/KDE. It's been great for a long time and only ever gets better. It's as if Windows 7 just continued to slowly iterate and add useful polish.
NixOS has a longstanding issue where library loading (and therefore program start, particularly GUI programs that load a lot) is n^2, but programs still all start in ~1 second or less on my n100 minipc. I still found that to be annoying enough to look into why it seemed so slow (and learned about the loading issue). Can't imagine things taking so long that you actually switch to another task. The same minipc can easily handle my 4k 240hz HDR monitor as well, and the whole experience is completely smooth.
The computer also just obeys me. It does exactly what I tell it to, and nothing more.
NixOS has a longstanding issue where library loading (and therefore program start, particularly GUI programs that load a lot) is n^2, but programs still all start in ~1 second or less on my n100 minipc. I still found that to be annoying enough to look into why it seemed so slow (and learned about the loading issue). Can't imagine things taking so long that you actually switch to another task. The same minipc can easily handle my 4k 240hz HDR monitor as well, and the whole experience is completely smooth.
The computer also just obeys me. It does exactly what I tell it to, and nothing more.