these matches happen you are not always lucky every Sunday it is difficult to always have control of the situation even when you play well and many times you have to have a lot of luck regarding Inter I would say that Atalanta were below their average performances therefore the victory of Inter was easy while Juventus faced a great Roma team who gave them a hard time
Every team always has a difference in every season including a team like Inter Milan itself this season even though Inter Milan have been able to beat opponents like Atalanta at the beginning of this season. However, for other opponents it is still not certain that Inter Milan can win easily unless Inter Milan's luck level can always be big at the weekend for a win in the matches they play. Likewise with Juventus who were unable to beat Roma at the beginning of this season, it does not mean that Juventus should be considered weak because Juventus could win more matches this season.