Post video. You are in denial whenever someone highlights a performance issue. You just post 'No problem here'. That's not helpful.
Yea, I hear ya on some of the artifacts that show up every now and then, and I did also observe the 1-2s lag with the 10 Finder windows, but overall, I mean puh-lease, OS X is still mountains better than Windows ever was and probably ever will be.
I just re-installed an older version of macOS because the newer one still sucks, and when I think about what re-installing NT, XP, Vista and Win 7 was like, it was an absolute pleasure and breeze to deal with the Mac. Thankfully, I saw the light and switched to the Mac after Win 7, so I never had to deal with Windows 8, 8.1, or 10.
During the installation process, I also didn't have to go through 5 or 6 reboots, nor did I have to wait forever and a day for Windows to download dozens upon dozens of updates, sometimes over 100, and other times a whole Service Pack.
When it was finally done, I then had to begin the arduous process of removing all the pre-installed crap-ware and trial versions of software I didn't want. Naturally, there were reboots involved here as well. And that's to say nothing of the dreaded BSODs (blue screens of death for those unfamiliar), the not infrequent crashes and comparatively poor overall stability depending on what software you paired with what version of Windows. I can't remember the last time I had a kernel panic. It was several Macs ago. It just doesn't happen.
So yes, the 1-2 second lag is there and yes, I am no fan of the most recent version of macOS that I've been trashing in other threads as of late, but I'd rather wait 2 seconds for something I'll never do again than go through the constant pain that is working with Windows.