Putting all plusvalenza jokes aside, it's great that Juventus fans can understand the financial part of the situation and take it into account. Should they though?
Juventus is a football club, and people root for them because of football. Football means winning on the pitch (in a perfect world - winning all possible games and trophies), having great players (in a perfect world - having all the best players), showing great performances (in a perfect world - the football is great both tactically and visually).
Money isn't an equal part in this equation. Yes, it plays its role, but it's only a secondary background and cannot be used as an excuse if the goals mentioned above aren't reached, especially when you declare that you already have a squad that is hard to improve and consider the biggest trophy in the world your real objective.
If you look at the football clubs that are the most successful clubs in terms of international football in Europe, they aren't built the way the Juventus management try to build their own club. Most of them are deeply in debt, loaning money from banks to fund current transfers, signing expensive stars that as a result allow them to sign big contracts with the club's sponsors, etc., which gives them a huge advantage over financially more restricted clubs.
FFP started regulating the market recently, but many big clubs couldn't care less about it - they are even OK with being banned from the transfer market and facing other UEFA sanctions if what they do allows them to be the best in football (or, at least, to seriously try to be the best).
I'm not saying that Juventus has to use the same means those clubs are using to get on top. It's up to the Juventus management to decide, but personally I'm completely against the use of any unfair practices and disapprove of them. What I'm saying is that if what they do is less effective in terms of football, then they cannot use it as an excuse, because football is about football, it's not about money.
If they really want to compete with the biggest guys for the biggest trophies, they must apply the strategy that can allow them to do that. The strategy that requires that you sell half of your squad each summer because of plusvalenza is not one of them, as we've already seen.
Financial health on its own is not a guarantee for success in football. Look at Man Utd. They are one of the most financially powerful clubs in the world, definitely in the TOP 3 and much bigger than Juventus. But in terms of football they are not even in TOP 30. So, what's the point if at the end of the day it's all about football anyway?
Do you think that the current Juventus development strategy where the plusvalenza is a king (a queen?) can lead them to the top of Europe? I'm not talking about some half-accidental success that cannot be reproduced, I'm talking about becoming a real European superpower like Barcelona and Madrid.
I believe, that's what most Juventus fans are expecting at this point as the next destination for this club. And all the frustration is coming from the realization that it's not what's about to happen in the foreseeable future. Some might call such fans "spoiled", but I don't think that it's completely fair, because what else could they want? "Let's stay at this stage for many years"? I don't think so.
The strategy the club has been using allowed them to get to the point they are at now, and that is great, considering where they started. But it's already been several years of stagnation and decline with this strategy, and there's no signs that things will change and these changes will be positive.