I also thought the same. Atalanta couldn't find the back of the net because Inter defense was very strong. However, after the first goal in the second half, that was when I started losing hope in Atalanta because Inter was able to spot out their weak points and took advantage of it. Currently, I don't think there's much hope for Atalanta to win Scudetto this season, because Inter wouldn't let that happen.
Will Atalanta win the Scudetto? Not at all; Inter Milan will not allow that to happen this season, and I am confident that Inter will do all it takes to win the league title again. I wasn't expecting Atalanta to do better against Inter Milan; just because Atalanta defeated Juventus 4-0 away doesn't mean they can win Inter Milan because Juventus has turned into an average club this season. I predicted that Inter was going to win, and the match turned out as expected.
Inter Milan are on a different form entirely, just watching how they humbled Atalanta who just trashed Juventus days before their game with inter. Though the title race is still open for the three sides who have relentless being on it this season except that Napoli has to drop points with Atalanta too in their next two games that's when we might actually give the trophy to the defending champions Inter Milan but they have to continue winning their remaining games to maintain their 3 points lead on the top.