If many predict that Brazil will win easily against Croatia, I'm also sure that many believe that in Argentina.
It could be that Brazil vs Argentina is the most likely option in the semifinals, but I personally feel unsure and still very confident that the Netherlands will advance to the semifinals even though the Netherlands don't have as many big name players as Argentina do.
If in 2014 in the same tournament in the semifinals the Netherlands lost to Argentina on penalties, then for the Qatar world cup the situation could have been reversed.
I hope Argentina wins against Netherlands in the quarter-finals and Brazil also wins against Croatia so that the two can meet in the semifinals. I personally did not underestimate the Netherlands in the match against Argentina, nor Croatia against Brazil. At this stage all the players will try to give their best which is expected to be of benefit to their country. Argentina is my favorite against the Netherlands, so I'll be support for their win.
But whatever it is, both matches are really difficult to predict so I wouldn't be completely sure the favorite team will win the match easily. The Netherlands have proven their worth, and so have Croatia. So no one should underestimate any team at this time.