I only watched the minion movies, and never any of the "Despicable" movies. Then I tried to watch this one. Me and my friend didn't make it to the end of the movie. This movie needed more minions in it. I couldn't care less about the brothers or family troubles.
Speaking of box office, this movie is another movie in a long series of movies that failed in the US and was saved by the rest of the world. 25.6% of incomes from the US is one of the worst statistics a movie can have. It's almost as bad as Fast 8 which also mad a billion dollars, but only 18.3% in the U.S.
Therefore, both movies usually get the status of box office failures despite these impressive numbers, because they also create disaster headlines.