System stutter when interacting with desktop, receiving notifications. X11 related

[tbg]

You might want to keep your eyes on this thread, and try this:

Garuda KDE Barebones Laggy

What is your memory usage like, and is it growing over time. I would try installing kwin-git , and if that is no better try kwin-lowlatency. Edit: You may also want test out kwinft (and its variations).