Ilaix Moriba joined RB Leipzig this summer window.
The 18-year old La Masia product joined the German club for £13million.
The young defender has contract disputes with the club and was unwilling to sign any contract extension that forced him to drop the senior squad and the B team.
“The last few months have been the hardest of my life,” said Moriba (via Goal). “We [my family] have received abusive messages but we have been able to get over it to be here today.
“I don’t deserve these messages. They [people at the club] have said many things that are not true and we have had to keep tight-lipped because of the respect that we have for Barcelona. The things that they have said in the press have not been fair.”
“I have improved at Barcelona with the support of the fans, but over the past few months they have not known how to behave,” he added. “I am not going to judge the whole fanbase based on these few people.
“I will always have Barcelona in my heart, it has been a complicated few months, but it has passed and I wish the best for the club, especially to Ansu, as I have seen that they have given him the number ten shirt and he’s the most suitable one to wear it, I wish him the best.”