Ok... this is the way I see this problem...
I too have calibrated my monitor a few times because of this problem. It`s not a high end monitor and is a few years old now so fair enough.
But...
As I and quite a few others have now said, this problem does exist. I know not everybody sees these purple/green (ish) "oil patches" but they are there and I`m struggling to accept that this a monitor problem in all honesty.
Surely if it was simply down to bad monitor calibration these types of problems would show up in other areas and with other games/software etc and, for me anyway, they don`t. I never ever saw this or had this problem in rf... I don`t have this problem in any other game or sim I play/drive, only in rf2 does this bug show it`s ugly face and I also started getting it after a certain build. I can`t remember which build it first started to show up but I can show screens from earlier (much earlier now as I got rf2 at b85) builds that do not have this problem. Which makes me think it`s rf2/HDR related and not monitor related. Also, as I`ve said now dozens of times, if HDR is switched off these problems completely disappear...
I`ve seen this bug in other peoples screens and videos, people that have never mentioned it so maybe they just live with it or haven`t even really noticed it... I`ve also seen other peoples screens/vids that don`t show it at all so surely if it was just down to my monitor and not rf2 I`d see it on everyone`s screens and videos as it would be my monitor that causing the problem but I don`t, as I`ve said.
I`ve also noticed that some third party mods don`t seem to suffer from it or show it as much anyway as ISI`s content seems to which makes me think it`s something more ISI/rf2 related too...
To me it`s a problem with rf2/HDR. I may be wrong but I just find it very difficult to accept it`s purely a monitor problem on my end when as I`ve said, all the other games/sims I play/drive don`t show anything like this in any way. I also do some photography and am a member of photography forums where I`ve posted my shots and whether people like them or not, not one person has ever said anything about my shots regarding the monitor being badly calibrated and I`ve read others say this about some other peoples shots in the past...
Imho, rf2`s HDR needs some serious tweeking... I know I`ve said this before only to be told that it`s fine and it must be my monitor but as I`ve said, I struggle to accept this.