To the OP, I completely understand your position. I don't see somebody who is desperately trying to hate on the game just for attention. More that you are genuinely upset/disappointed, after spending all your money that Civ6 has not lived up to your expectations of the franchise.
I have to say that I agree with the points you make, I had a similar initial reaction to the game as you. However, for me just graphics/UI issues are not enough to stop me enjoying a game. The good news is, I got used to the graphics/UI. I also got used to the complexity of the game, which as others have already said, it is the most complex game in the franchise so far.
The bad news...for all its extra complexity, Civ6 lacks so much in variety and strategic depth (if you understand the systems in place, which most don't). If you are not looking to delve too deep into the strategy, like probably 95% of players, I think you should give Civ6 more of a shot.
Civ 5 is terrible in that it punishes you when you actually try to build an "empire", it's why I can never go back.
Civ 6 actually punishes you in almost the exact same way, if not even more so. However I get the impression most players don't fully understand or notice how happiness(civ5) or amenities/housing(civ6) systems actually work. Both games are actually very similar in that regard, civ6 just made happiness less noticeable.