Jumping onto this thread a little late, but just had this experience with upgrading to a 32" Samsung Curved 4K monitor.
I hated the curve for graphics work. I hated the curve for spreadsheets. I hated the curve for anything that wasn't a video or video-like.
I hated that lines / boxes / etc. would have just enough of a curve to it that it didn't look straight. And I just couldn't get used to it.
So. Today the replacement for the replacement comes in: a Samsung 4K Non-Curved monitor.
And tomorrow the curved one circles back to the store.