

blame the devs for that. There was an git issue a year or so ago about just that. a user asked for tiling, many other users chimed in and said “yes, please” the KDE devs said “no, we personally don’t like or use tiling so you’re not going to have it either.” Which essentially sums up KDE development. IF they don’t use or like something than neither will you.
It’s pretty much the best and only option for KDE but even then it’s very janky. COSMIC is going to be the best option for this but again, you’re then sacrificing the customization you’d get with Plasma.
And that sums up Linux DEs/WMs. If there’s something you want you’ll have to sacrifice something else. because there are NO DEs/WMs out there that will have everything you want in one package unless you build it yourself.
…unless you’re MaoMaoWM and you’re the dev who just said “fuck it, I’m including everything”