I guess I can add my 50" Samsung MU6120 to that list. It had terrible viewing angles and I mean
terrible. The colours were very washed out even at a slight angle and the black levels weren't even close to my old 50" Panasonic EX700B (which I had sold to my uncle). The only reason I even bought the Samsung was for better OSSC compatibility, but I quickly learned that I should have just been happy with what I had, NTSC at 3x using custom settings and it looks fine anyway.
The colours were also far superior on the Panasonic, I don't care for the accuracy as I'm not a photographer, but like nice vibrant colours especially since I have an AMOLED screen on my phone. I make sure the colours aren't so over saturated that they lose detail (clipping) by testing with colourbar images, but the Samsung starts clipping far earlier than the Panasonic one. The red, magenta and cyan colours had hardly any vibrancy to them either in comparison.
Fortunately, my uncle will always view the TV from the centre with the way his room is and he isn't even nearly as fussy as me with colour, contrast and black levels etc. and he even likes the Samsung TV's OS more, so he agreed to swap TV's.
So moral of the story is that I had sold this TV to him for €400 then I paid €550 for the Samsung, meaning I just threw away €150 on nothing just to use an inferior TV for a few months, that is the remorse.
But even though that happened, I'm still just really happy to have my old TV back
