Aristos
Lightseeker
that's because AI can't handle complex civ 6 system... which they haven't updated from civ 5 version.
Ai civ 6=Ai civ 5.
Incorrect (at least according to their own declarations). AI in civ 6 uses Behavior Trees, a completely different beast from what the AI was until civ 5 (for which the code is available and I have looked extensively into). A few years back, there was extensive and fascinating discussion about the huge differences between BTs and traditional AI systems, and how BTs are the worst possible selection for TBS games. I was part of that debate, I remember.
So, NO, AI civ 6 ≠ AI civ 5, and given the existent research about BTs and how they are perfect for RTS but the worst possible option for TBS, well...
Look it up. It's fascinating reading.