The Liverpool keeper has joined up with Rafa Benitez at Napoli on a season-long loan following the £9m arrival of Simon Mignolet.
Fans' favourite Reina has expressed his love for the club in an emotional statement on his official website - but slammed Liverpool management for the shoddy way they handled the deal.
Reina, who signed for Liverpool in 2005, said: "If I have a complaint, it's the way I'm leaving. I think it's natural to be disappointed by the fact that the management agreed my move to Naples without me.
"Much has been made of the fact that I had told the club that if an offer from Barcelona came I would have liked to consider it - but I had also spoken to the club about the possibility of extending my contract if this did not happen.
"I told the coach [Brendan Rodgers] I wanted to play for Liverpool and Barcelona only become an option for me if they had a good chance.
"When no offer came, I was ready to fight for the title so I was surprised that Liverpool decided to inquire about my departure to Naples."
Belgium international Mignolet is seen as a better long-term option by Reds chiefs but Reina is hoping his career on Merseyside isn't over yet.