How have the club been disrespectful to Dani then?
If Alves feels disrespected because he thought he had an optional extension for his contract, that's his agent's fault for conveying false information to him.
It doesn't matter if the club was or was not disrespectful to Alves, it only matters if Alves himself feels that way, and he surely does, because guess what, Alves is in the strong leverage position here thanks to all the fuck ups by the board.
The club needed to do one of two things:
Either a year or more ego, realize that Alves was getting older, and was having inconsistent performances, and they needed to plan to let him go in 2015 when his contract ended by going out and getting quality replacements. And no, all this talk about what LE wanted and couldn't get is not excuse for failing this. The plan needed to be in place and Montoya and Douglas should not have been it.
Or, they needed to secure themselves against transfer failures and other problems, by extending Alves THEN, while still with a year or two under contract, for another couple of years.
They did neither. They rolled into this season with Alves not renewed and having never been offered a renewal while playing his last year of contract, and having terrible talent to back him up and eventually replace him afterwards. Oh, and transfer banned to boot.
If Alves feels disrespected and slighted at being now, at the last hour, being low-balled (to his estimations) and treated as a fall-back plan, then he surely has reason.
We also don't know the intimate details of negotiations, treatments, etc, like Alves does. If, again, he feels disrespected, he has his reasons. Not the first time this board has handled players poorly and made them upset.