These are periods that all teams go through, see Real Madrid, or Barcelona a few years ago.
There are no teams that are free from problems, even Manchester United, who were at the top years ago and are now floating in the middle of the table.
I am sure that Inter will rise from its ashes.
Inter Milan are not mired in problems so they should not be considered a team that is falling even though last season they only finished as runners-up and also did not succeed in the UCL final which caused Inter Milan to miss out on one of the prestigious trophies last season. So in general Inter Milan just need to be better next season because they are a team that has more strength compared to some of the teams you mentioned. While for a team like Manchester United it is fair to say that they have to rise because they finished last season in a bad position.