Roberto Mancini believes he was shown a lack of respect by former club Manchester City.
The Italian guided the club to their first Premier League success in 2012 and won the FA Cup a year earlier.
But after defeat to Wigan in this season's cup competition and a second-placed finish to Manchester United in the league, Mancini was replaced at the Ethihad Stadium by Manuel Pellegrini.
And the 48-year-old feels that decision was unfair.
"I never expected what happened. I thought I deserved more respect for the job I did at Manchester City," he told Corriere dello Sport.
"In three and a half years my staff and I did an extraordinary job. I am proud of my work there.
"We rebuilt a club that was not at the top level. They wanted to get into the Champions League, and I got them there.
"We won against all the great clubs - we beat Manchester United 6-1 at Old Trafford.
"For three years City played the best football in the Premier League.
"But Sheikh Mansour and Chairman Khaldoon are two great leaders, to whom I am forever grateful."
Mancini also said the time was right for Mario Balotelli to return to Italy, after departing City for Serie A club Milan in January.
"We didn't get as many goals as we'd have liked from Mario," he continued.
"For some time I realised that England was no longer good for him.
"He, like Luis Suarez, had been targeted by opponents, referees, the public.
"He is an extraordinary player. At 17 I handed him his debut at Inter. I took him to the Premier League at 21. You know what kind of relationship I have with him - I love him.
"But he needed to go home."
|Matuidi: Cavani on par with Ibrahimovic|
|Yeboah set to join Borussia Monchengladbach|
|Rooney a ´chance´ to face West Ham|
|FIFA Club World Cup Preview: Bayern Munich v Raja Casablanca|
|Benzarti praises ´extremely talented´ Raja Casablanca|
|Ranieri unsure over Falcao return|
|Coupe de La Ligue Wrap: Cavani leads PSG to dramatic win|
|Copa del Rey Wrap: Real Madrid through as Sevilla crash out|
|Tottenham job appeals to Sherwood|
|Sherwood gutted after defeat|
|Hughes: United worthy winners|
|Moyes pleased to see United weather storm|
|Allardyce hails West Ham fight|
|Coppa Italia: Juventus 3 Avellino 0|
|Manchester clubs kept apart in League Cup semi draw|
|League Cup: Tottenham 1 West Ham 2|
|League Cup: Stoke City 0 Manchester United 2|
|FIFA Club World Cup: Raja Casablanca 3 Atletico Mineiro 1|
|Sheffield Wednesday, Wigan abandoned due to heavy rain|
|United face anxious Rooney wait over injury|
|Messi making good progress|
|Ramos ban overturned|
|Osvaldo charged by FA|
|In-demand Ince offered new Blackpool deal|
|Molde confirm Solskjaer approaches|
|Kramer keen to continue home record|
|Rodgers: Henderson has potential to get even better|
|Ruiz on Anderlecht´s radar|
|Swansea, Hull fined by FA over player behaviour|
|Leeds keen on re-signing Gradel|
|Leverkusen announce Ryu deal|
|Ribery named Bundesliga Player of the Year|
|Moyes: No Zaha interest|
|Barcelona, Real Madrid in European Commission investigation|
|Basel: No Tottenham approach for Yakin|
|Chelsea set for Guarin bid, agent claims|
|Lewandowski has Dortmund goal concerns|
|Pogba, Pirlo will not sign before Christmas, says Marotta|
|Guardiola convinced to join Bayern after ´meat´ and greet|
|Martinez: Everton seen as a ´perfect´ loan destination|
|Anderlecht ´perfect´ for Defour, says Van Holsbeeck|
|Watford appoint Sannino|
|Sakho feels ´lucky´ to play with Suarez|
|Lippi: Too many teams competing in Club World Cup|
|Moyes ´told Welbeck to learn from Rooney´|
|I would kill myself over match-fixing, says Gattuso|
|Hughes dismisses calls for Januzaj protection|
|Aguero ´could miss up to two months´|
|Guardiola lauds Ballon d´Or nominee Ribery|
|Liverpool open Suarez contract talks|
|Copa del Rey Wrap: Barcelona, Levante cruise through|
|A-League Preview: Derby date beckons for winless Heart|
|Pearson upbeat despite Leicester defeat|
|Poyet urges Sunderland to build on Chelsea win|
|Mourinho rues missed chances|
|Pellegrini proud of professional Manchester City|
|Bayern on another level, says Beckenbauer|
|League Cup: Sunderland 2 Chelsea 1 (aet)|
|League Cup: Leicester City 1 Manchester City 3|
|FIFA Club World Cup: Guangzhou Evergrande 0 Bayern Munich 3|
|Zenit and Olympiacos punished with partial stadium closures|
|Sherwood wants positive reaction|
|Ancelotti expected La Liga title fight|
|Moffat charged over betting allegations|
|Wilson appointed at Barnsley|
|Wilshere charged by FA|
|Gattuso determined to clear his name|
|Moyes slams sacking culture|
|Mackay refuses to resign despite owner criticism|
|Redknapp reluctant to take Taarabt back|
|Amat pleased with development|
|Hughes optimistic of League Cup progression|
|Perez: No bids for Di Maria|
|FIFPro demand transfer system overhaul|
|Edwards sacked by Perth Glory|
|Allardyce not fearing the sack|
|Howson commits to Norwich|
|Tevez resigned to Argentina snub|
|SFA uphold Butcher´s one-match ban|
|Zapata rules out United switch|
|European Ombudsman calls for action on Spanish tax complaint|
|Albrighton eyes new Villa deal|
|Bale to miss Copa del Rey clash with ´small injury´|
|Pardew will bide his time in January|
|Kreuzer confident of Hamburg improvement|
|Van der Sar: Moyes can turn United around|
|Maradona backs Ronaldo for Ballon d´Or|
|Tottenham warned off Klinsmann|
|Costa Rica Primera Division: Alajuelense 0 Herediano 0|
|Lyon wary of Chornomorets Odesa|
|Guardiola talks up Lippi, Evergrande|
|Chile Primera Division Wrap: Chile, Deportes Iquique reach final|
|Garcia laments defensive mistakes|
|La Liga: Real Valladolid 3 Celta Vigo 0|