There are some things that are nice. The dock looks nice. The transparent menu bar is nice enough too and there is a toggle off switch if it doesn't work for you. Spotlight looks fine. But the rest is so bad that I just cannot fathom how someone at Apple did not stop it before release. I would be throwing a fit to stop it from being released if I was in Apple and had any sway at all. I assume the executive team was all looking at it and using it before release. So how did this happen? The new side bar and the new tool bars are abominations. I cringe every time I have to use the finder; it is just a blob of various shades of white or, if you prefer, dark mode, grey.
My hope is that if nothing else they roll back the sidebar and the tool bar changes or do a complete rethink on how they are implemented. If they rolled back the extra rounded corners I wouldn't complain either.