VGA was already on the market for 9 months by the time Windows 2 released.

Imagine the backlash: "new Windows version requires a $300 video card and a $400 monitor to run". When Windows 95 finally dropped the support for EGA, many people were upset (including me).

9 months? LOL

Thunderbolt 5 was released about 1 year ago. You can count the number of all laptops that support Thunderbolt 5 with two hands (probably one hand, but to err on the safe side).

Is there any reason they took the most ugly colours? They could have just used 16 nice colours or?

There is a reason why they're the most ugly colours. Windows 2 only can display 8 colours: CMY+RGB+Black+White. Cheap colour monitors had only four input pins - RGBI - and could at best display those eight colours, plus a darker version of them.

They used the colors which had the best contrast against each other and if there was a driver issue, colors which looked the more appropriate in greyscale. Driver issues, forgotten today, drove most architectural decisions at Microsoft. The core word they used was ‘working with partners’. People used to bring it up all the time in interviews in the 80s regarding PC’s but not all in one computers like Apple and to a degree amiga. I remember people used to watch football on television on portable tv’s which was only made possible because the jerseys had a light and dark version which visiting teams would get to choose which one they get.

Not true. 16 colors at a time. EGA had a color palette of 64 colors. Depending on the card, precise palette cycling can be used to appear to have all 64 colors available so long as too many different pixels aren't used too close together.

That wasn't really a possibility for anything but static fullscreen images, or extremely optimized demos. Even then it would be difficult, since there is no way to generate an interrupt at a specific raster position (unlike CGA, where the pixel clock was synchronized with the system timer chip).

I didn't say it was for full-motion video or arbitrary images. Interactive calibration is possible.