I've always been "pro-change" for UIs, as opposed to the bunch of people in the "bring the old UI back" camp, but Tahoe looked like fecal matter from the moment it was introduced.
On iOS it's manageable with reduced transparency, but on macOS it's just so awful I won't upgrade.
So I’ve enabled reduced transparency and all the other accessibility settings I can find to remove the terribleness.
The UI is now mono-coloured gray and looks like MacOS back in the days before OS X was a thing - but it’s still better than what Apple “envisioned” with Tahoe.
On iOS it's manageable with reduced transparency, but on macOS it's just so awful I won't upgrade.