Defender Gerard Pique described Barcelona's 8-2 Champions League humiliation at the hands of Bayern Munich as a "disgrace" and "embarrassing" and claimed the club had "hit rock bottom".
Thomas Mueller and Philippe Coutinho - on loan from Barca - both scored twice as the German double winners blew them away in a ruthless display that will prompt serious questions over Lionel Messi's future in Spain.
Ivan Perisic, Serge Gnabry, Joshua Kimmich and Robert Lewandowski were also on target for Bayern, with Barca's goals coming via a David Alaba own goal and a second-half strike from Luis Suarez.
"We have hit rock bottom. This is not the first, nor the second, nor the third time. We are not on the right path," said Pique.
"Coaches and players follow one another, but it has been several years since we have been able to be competitive on a European level.
"We all have to think internally and decide what is best for the club, for Barca. Tonight was unacceptable for Barcelona."
Pique added on the club's website: "It was a horrible game, the feeling is terrible, embarrassing is the word.
"We can't compete like that, you can't play like that in Europe. I hope it is useful for something.
"Now everyone has to have a good look at themselves, the club needs change and I am not talking about the coach or the players, I am not pointing the finger at anyone.
"Nobody is safe, I am the first to say that I will go if new blood has to come in, I am the first to leave.
"We have to have a real look internally about what is best for the club."
President Josep Maria Bartomeu insisted changes have already been planned for next season, and will be confirmed next week.
As well as a likely new manager, Barcelona's 2021 presidential elections could even be brought forward.
"It has been a very, very tough night. I am sorry for the Barca fans and members, for the players, for everyone," said Bartomeu.
"We were not the club that we represent, I am so sorry.
"There are some decisions that we had already made, and others that we will make over the next days.
"Announcements will be made from next week, we need to make decisions after things have calmed down.
"It was a devastating result. I congratulate Bayern, they played a great game and deserved to go to the semi-finals.
"We were not up to the occasion and we can only apologise to the members and fans."
Barca coach Quique Setien offered no indication that he would resign, but it seems inevitable he will be replaced.
"It's too soon to think about whether or not I will continue," Setien said. "It doesn't depend on me. There needs to be a wider reflection, taking into account the situation and the importance of this defeat which is so painful."