Serie A is a decent league in my opinion. The competition is good. Of course, the English Premier League is the best league in the world right now. La Liga is decent. The problem with La Liga is that the competition is genuinely decreasing day by day. At least the competition for Real Madrid and Barcelona is certainly decreasing. Every season Barcelona and Real Madrid are almost always at the top of the table.
Juventus made problems for Serie A this season, the point deduction of 10 points and more has been a big topic in the media. This leads to no trust and there are players who do not want to play at such a club. Juventus has done even worse in the past: manipulation. Most of the players in Italy are Italians, they want to stay in their home country. You can see that in the national team, almost all of them play in Italy.
Spain and Barcelona or Real Madrid have much more money. I think they also have other chances Tor ein international titels.
In the past Serie A was the most attractive league because of its highly competitive rivalry, but when the case of match-fixing and or calciopoli and then it made Serie A lose confidence and also decreased audience interest. It took a long time for Serie A to recover but over time, the Premier League became the most attractive league until now. But indeed, despite this of course Serie A is still an interesting league to watch and that is proven, in the last season all representatives of Serie A clubs can reach the final in Europe. At least it is also proof that, the performance of Serie A teams is still growing from season to season.