With no doubt, this is typical PVA behavior somewhat exaggerated by the particular model issues.
The calibration kit (add $150-200) improves the image quality dramatically (especially considering where the start point was). Black crush was reduced to the point that is normal for a good PVA.
But shall we buy a calibration tool at a cost of 50-70% of the monitor price just to bring it in order?
A tough question.
A thing to remember: even a proper calibration does not remove PVA intrinsic issues like color shift that also includes the loss of darker details from the front view (black crush).
This is an integral part of PVA technology. One can whiten the image to pull details out of darkness by screwing gamma down, but that is not a calibration. That is just whitening (spoiling) the whole picture.
The proper calibration (gamma 2.2, 6500K) leaves color shift/black crush at the point where it should be for PVA.
Fortunately this screen has no wide color gamut.
There are normal colors and live faces after calibration..... until you move your head.
Well, this is still a PVA. The turtle feels much better but color shift is still present. Silverish false 3D effect is still present. Serious loss of contrast from angles greater than 25-30 degrees off axis is present.
Any minimal change in viewing position makes colors float.
Generally speaking, viewing angles of this model (and most of PVAs as well) without significant image deterioration are within 75-80 degrees, 90 at most.
178 degrees? Joke...
If you want to see your vacation snapshots - yes, the Samsung F2380 (after calibration) offers "better than any TN" picture quality.
By no means the Samsung F2380 can be recommended for photo editing.