KDE has given me the desktop I need for the past few years. Hyprland isn't a desktop environment, as far as I know.
Before KDE I used Cinnamon on Linux Mint. It was functional, but after many years I wanted a change.
Use whatever suits your needs. In my experience, KDE and Cinnamon are the most complete desktop environments without having to install extensions or extra software. Both are mature, have large communities behind them, and release incremental updates frequently. Those are my criteria for a good desktop environment.
As other have said, a combination of Firefox PDF tool, PDF Arranger and Xournal++ is all I've ever needed. And Okular is nowadays my viewer of choice, which does a lot on its own, too.
Changed to Cinnamon (Linux Mint) after GNOME 3 and Ubuntu's Unity went bonkers, then changed to KDE Plasma some years ago.
I think KDE is constantly working to improve the desktop paradigm. GNOME tried to change the paradigm... I didn't like what I saw. I'm too old to learn new tricks.
Never.