I agree that Juventus became worse, but at the same time it looks like other teams got better as well. Do you really believe that Milan has been as good as this and last year when you compare it to 5 years ago? Same could be said about Inter as well. I believe that there are better teams right now in Serie A and that matters a lot.
If there weren't any good teams, there wouldn't be any viewing fun neither, we wouldn't want to watch it, I am sure that more people watch Serie A then most other leagues, there are only a handful other leagues that people watch more. Hence, it's clear to me that they are great teams, and I mean like top 10 is pretty cool, not just 1-2.
I think this season the italian team performance almost has a lot in common both inter milan, milan, napoli and juventus, juventus are out of the championship competition due to their poor performances at the start of the season, but towards the second half of the season juventus are starting to find their rhythm again, according to I'm not much different from what was experienced by Inter, Milan and Napoli, the only difference is that Inter, Milan and Napoli have played quite well since the season started but towards end of the season their performance started to be inconsistent, but fortunately these 3 teams already have enough points so it is indeed difficult for other teams to catch up with him, that's why I say that the Italian league team this season has the same condition, namely nothing bad but also nothing good.