I don't agree at all, Inter Milan had bad a performance at the start of the last season and they were unable and that's why we saw a huge gap between Inter Milan and Napoli this season and Inter Milan couldn't race with Napoli while time after time in the last weeks of the season Inter Milan had better performance and they even played in the final match of the champions league and there is the same story for Roma, however, Roma was a bit unlucky otherwise they could win the title and beat Sevilla.
It's true that Inter milan didn't play too well at the start of last season where they struggled to find their best form, even in that situation many of their players suffered injuries which made them difficult in their matches at the start of last season. So it's only natural to see the wide gap in points between Inter Milan and Napoli at the end of last season's competition. For me inter milan is a team that is building their foundation to be stronger in Serie A and last season was their season to build a team.
I think this season, to be precise, after Inter Milan finished runners up in the Champions League, their motivation became stronger for Serie A or the Champions League this season. The signing of the players has done quite well even though in this case they have lost an important player in the squad in this season transfer window but I am sure that Inter Milan will be a team to be reckoned with in Serie A next season.
I think if everything continues like that for Inter Milan, Inzaghi, and his players can have a great chance to even race for the Serie A title however I'm not sure they can keep this performance for the next season because the performance we saw from Inter Milan, especially in the champions league was really unique against Manchester City and this team with Inzaghi got a high chance for the Serie A title.