The implication of serious cinema and art, hugely favours the theory that more mature story telling will give you better art. this is because mature story telling pushing you more and don't restrict your imagination or potential. this has been proven over and over again, it has been proven directly in the comic book genre. Batman and Robin is considered childish by many people, if not everyone, even to the people who enjoy it.
Additionally you can have many kids tales with mature themes where the entire universe has not been dumbed down on film in an unbelievable manner, I still consider Harry Potter, Chronicles of Narnia, To Kill a Mockingbird and Lord of the rings a kids tale, however their movies did not dumb things down to the point they needed to look like cartoons because a studio is manipulating the family friendly narrative.
Half Blood prince is arguably the best fantasy looking movie in cinematography-vfx of the 2000-2010 period. While marvel has the story in comics that can give it this type of style. No MCU film however can look like that on film.
There is a point in comparing MCU to gravity and interstellar, because it does highlight a good critical point. If you think of other comic book directors in their prime, Bryan Singer or Christopher Nolan, they would have opted for those kinds of VFX with their comic films.
About Thanos been realistic we will just have to agree to disagree, If thanos looks realistically we have to come up with a new word for Gollum, You see it is not about Thanos been realistically by your standard as a MCU fan, it is thanos been realistically by general cinema standard, which is why I am using all this films like LOTR, Harry Potter, Gravity as examples. I think the issue here is that MCU film standard is quite a low one in the bigger seas of VFX films, however still has to be considered directly because people are making discussions about it. we should not however deny another comic film like the Snyder Cut that did reach those standard because people are too carried away by Marvel vs DC.
This movie speaks for itself.
This also looked much better on HD TV than YouTube. I cannot say the same for IW/Endgame.