Balotelli scored the winning goal for Italy in their tournament-opening 2-1 triumph over England but the Azzurri suffered 1-0 defeats to Costa Rica and Uruguay.
"The fault," the striker continued, "I'm not going to bring it down on me just this time because Mario Balotelli has given everything to the national team and has not made a mistake (from a character standpoint).
"So find another excuse somewhere else because Mario Balotelli has a clear conscience and is ready to move on stronger than ever.
"I am proud to have given everything for my country."
Balotelli has on numerous occasions in his career been the target of racist taunts.
The 23-year-old referred to his African heritage in his message.
"Perhaps, as some of you say, I'm not really Italian," he said. "The Africans wouldn't have blamed one of their brothers. Never. In this, we black, as you call us, we are light years ahead of you.
"Disgrace is not one that misses a goal or runs less or more. Disgraceful are these things (unfair criticism)."
Italy captain Gianluigi Buffon and midfielder Daniele de Rossi were extremely frustrated after Tuesday's game.
"I often hear said that there is a need for change, that Buffon, (Andrea) Pirlo, De Rossi, (Giorgio) Chiellini and (Andrea) Barzagli are old," Buffon said to www.figc.it. "The truth is that when you have to push the wagon, this group is the first to do so.
"We must respect them, not for what they (the veterans) have been but for what they still represent.
"On the pitch, you have to work and it's not enough to have the 'he could' or 'he might do'.
"On the pitch you see who's there and who's not."
De Rossi agreed with Buffon.
"Not because I am among the four veterans that Buffon has 'saved'," the Roma experienced midfielder said. "But because it's true that we express the right spirit and that we are always the first to show our faces.
"Those who don't feel like putting the same effort, that don't have the same passion should stay at home.
"We have to remember what has happened here and start over as true men.
"Not with figurines or personalities, these are not needed in the national team."