When Starcraft 2 came out, there were a lot of people upset that you could select 255 units at a time instead of just twelve, that you could select multiple buildings at a time, and that you could rally your workers directly to mineral patches. Why? Well, they thought it dumbed down the game and made it too easy to play. In reality, these changes are probably the best changes that have ever taken place in the starcraft franchise, because they're changes to an artificial limit made from the program itself, rather than any real limits from the game. Making the game easier to play is never a bad change. It reminds me of a game called Othello that I have, the tagline on the box is, "A minute to learn, a lifetime to master." That should be the goal of civilization, and I think the changes to the UI is making the game easier to learn, but the changes to the game itself is making it harder to master, which I'm excited about!
There are plenty of legitimate criticisms of Civ VI. The turn times looked somewhat long, the edge of what you've explored was a bit too similar in color to the unknown territories, it could maybe use a few more units, and there will probably be balance issues for a while. However, there will always be some people who just hate change for the sake of change, and its best to make your own judgements about what is good criticism and what is bad criticism. Sometimes people just think all change is bad, when in fact, it can be great!