Updated.
I have used Microsoft Office for many years and wanted to see how LibreOffice has come along in the meantime and it does not do as well as I would have hoped for on Windows. There is no included updater tool as in Firefox, so my old version stopped working completely (frozen UI) and the ancient hassle to download .exe files. Not a great start.
The dark mode switch causes buttons to be in the wrong colour looking like a buggy mess until a restart, but even then some of the icons and application colours were not applied correctly until I manually changed them so.
The ribbon view in Calc has its setting burger button on the right and it opens on another screen next to it?
What completely breaks it for me is the broken window resize. The ribbon tab titles are not rescaled and become inconveniently small. I then discovered the the compact grouped view and it made a better initial impression on me. Then I snapped the the window to the left and the UI is just cut off. Manually resizing it horizontally just breaks everything even more until the UI is empty and the rest is moved into the arrow.
The old school UI view meanwhile works and resizes, but it might be the slowest and laggiest UI on resize with goofy stretching I have seen in quite some time.
Also I really think the default theming and the 6 presets are questionable in fashion, but this is the least of its problems.
Wondering what happened to the development of LibreOffice? There are definitive improvements and probably there are even better under the hood changes, but why would such a large project ship such a bad experience? Was the core of the UI never touched the past 15 years? I have to to use an alternative.
EDIT: Resize runs better after forcing Skia Software renderer. Should not have to do that with an up to date AMD driver. Skia/Vulkan was the culprit. Disabling Skia leads to flicker on resize, so even more rendering bugs.
Meeh, does the job for me. I'm not much of UI person, I use whatever the defaults are.
I'd also mention that I don't use Full HD or larger monitors (mine are something like 1400x900, can't remember), so maybe that's why it doesn't actually bother me (I don't scale anything to be honest).