Three things;
1) Kodak Ektar 100 is, by purpose, non-realistic. If you expect realistic color rendition and have accidentally bought this film, it is your problem of not doing your homework.
It is good to have choices; it is even better to have freedom to not choose them if you don't want to. However, you should not ridicule other's right to make these choices.
It is so funny to see people complaining of too many choices of film today!
2) There is no universal definition what is "good" or "bad". Multitude of people, me included, like the color rendition of Ektar. It is not about being wrong or right. Of course, there can be a certain reference of being NEUTRAL, but Ektar does not even try to be neutral, and it doesn't have to, because Kodak already has two other neutral color neg film products.
3) APUG is not for discussing scanning. (99% of scanners sold are broken and 99% of scanning software sold are nearly useless, due to idiots designing them. I have built my own scanner from scratch and written the software for it, and it was one of the easiest tasks in my electronics/programming field of hobby ever.) This is a typical scanning-related problem and due to the difficulty of solving it, discussing scanning has been forbidden in APUG. You can try DPUG.org instead, but don't expect to get an easy answer when it comes to film scanning with broken equipment.
I print my Ektar optically (that's what we discuss here at APUG), and it prints without cyan cast with the standard filtration like any color negative film. It has SOMEWHAT increased saturation and a MINOR shift towards cyan in certain colors that ACTUALLY look somewhat cyan in real life to begin with.
99.999% of images shot on Ektar you find on the Internet, are indeed shot on Ektar, but then scanned with a broken scanner, autoadjusted for colors behind the users back on the scanning software, and then further modified by the user using some piece of broken software such as Adobe Photoshop, which automatically creates color crossover errors when trying to color correct due to an amateurish bug or design error in handling of gamma-corrected values. Then the users hassle with all the knobs this piece of software allows until they have something they are satisfied enough with, and upload it to the 'net. It has NOTHING to do with how Ektar performs or what you or me can do with it anymore.
In reality, the color of the sky is a VERY complex system, like many things in the nature are!
It varies hugely depending on time of day and quality of light. The amount of scattering is dependent on the amount of water droplets, smoke and other particles. The higher the scattering, the more light is mixed to the "background" color of the sky. Now, near the sunrise or sunset time, this mixed light is yellow in color, so that the combination can vary wildly from yellowish-green to green, cyan and blue.
If you try to use sky as any sort of color standard, you are severely off. It is surprising how ignorant people can be about our very surrounding nature -- how blind can we be even for something we look at all the time? "The sky is blue" -- is it really? What is blue, anyway? If "blue" is the color of sky, then there are quite a bit of different blues.
If we look at the art of painting, there are many ways of expressing sky color or reflecting sky in water. Sometimes it is depicted as having a deep, almost violet, ultramarine shade. Sometimes it is painted cyan, sometimes even cyan-green. This all is based on reality, but typically exaggerated. Ektar is a film with exactly this purpose; it exaggerates colors to create painting-like depiction of the reality, with a certain palette that indeed leans a bit toward green-cyan. This is great because there are already products leaning towards ultramarine-violet thing, such as Fuji chrome films (especially Velvias), but AFAIK, Ektar is really the only one that has this particular green-cyanish palette. If you don't like it, it is your problem then. You don't have to use it.
You can vary the palette quite a bit with filters (pre or post) or adjusting exposure, but for more realistic products, try Portra 160 or Portra 400. It is best to have them all so you can choose according to your needs.