tomscharbach The menu is the biggest bump in the road for me, so I am experimenting with using the Menu Editor to develop an "All Apps" menu similar to motif available in both W11 and Budgie.
It occurs to me that you might do well to put off such a project for a while, to find out just how much of a problem it actually is after you've gotten more familiar with Plasma. I use Windows 10 (rarely), Budgie, and Plasma, and I've never felt the need to modify any of their menus. Our requirements appear to differ in that respect.
I actually use the icon-only task manager far more than I use any of the menus, to be honest. Based on your screen shot, it appears that you make good use of that as well.
In fact, if you were to ask me what's different between the Budgie and Plasma menus, I'd need to take a quick look before answering you. Each one seems very normal to me, and neither seems any easier to use than the other, albeit they're not exactly the same.