Messi is outraged by the situation at the club because important information is leaking to the media, and he doesn't like club president Bartomeo.
Source : https://cadenaser.com/programa/2020/07/03/el_larguero/1593727289_858794.amp.html?__twitter_impression=true
It seems that Messi is ready to leave Barcelona next year.
I don't think Messi will decide to break the contract with Barca. you may know, Messi has been in this club since the beginning of his career. Even he received many good offers from others club, but he didn't leave Barca. He may not like Bartemeo, I think they will resolve this issue through negotiations. In 2013 we have seen some news that Messi will not play in Barcelona anymore. But What happened then? he is still playing in Barca. on the other hand, within a few years he will retire. now he cannot give any extraordinary things through joining the new club. because, it must be taking a little more time to adapt himself to a new club. so, I think Messi will stay in Barcelona, and he should retire from staying this club.
Which is safe and absolute in life?
For Ronaldo we were also sure he would stay at Real forever but he still went to Juve.
After all, judging by this article in Marca, Manchester City really wants to bring Messi. https://www.marca.com/en/football/barcelona/2020/07/03/5eff91f7ca474156238b457f.html
As we know, his adored coach Pep Guardiola is in Manchester City and if the problems in Barcelona are not resolved soon, and Barcelona falls into a crisis and stops winning trophies, why do you think it would be so impossible for Messi to decide to end his career with his former coach?
Barcelona already lost the opportunity to win the Spanish Cup and Championship this year and due to the current situation at the club, I don't think Barcelona will win the European Champions League either.
Messi will be unhappy again.
A little more on this topic: Lionel Messi: Why Barcelona captain is becoming increasingly fed up at the Nou Camp
https://www.bbc.com/sport/football/53279422