Bob Bradley has said he failed to put his stamp on Swansea during his time at the club, and has praised new boss Paul Clement for doing an "excellent job" in his place.
Bradley, the Premier League's first American manager, was sacked by the Swans in December after just 85 days and 11 games in charge.
And the 58-year-old former United States coach admitted he had not accomplished what he'd hoped upon taking the job, writing in The Players' Tribune: "I failed. Failed to put my stamp on the team at Swansea. To give it a real identity. A real personality.
"I never managed to find the right balance between attack and defense. I couldn't find the answers for this group to play with the commitment and passion that so many of my other teams possessed. We never found consistency or confidence."
Swansea conceded 29 goals under Bradley while collecting just eight points from a possible 33 before the former Egypt boss was sacked.
Former Derby County boss and Bayern Munich assistant Clement was hired as his replacement and quickly earned Manager of the Month honours for January as he lifted the club from the relegation zone.
And Bradley praised his successor, saying: "Paul Clement followed me as manager and has done an excellent job. Team shape has improved and the confidence has returned.
"Yes, Paul benefitted from the transfer window that I never had. But that's football. It can be a tough business and it's important to respect good work. Full credit to Paul."
Bradley, however, insists he gave his all to succeed at the club and issued a final message to the supporters.
"One last word for the supporters. I loved my time at your club," he said. "I was committed to making it work. I'm sorry I couldn't be your manager longer.
"For 85 days I put my heart and soul into Swansea City. I listened and observed. I watched games over and over. I constantly engaged the players and staff to figure out how we could become a good team.
"I pushed training and challenged the players to believe. To get better. To understand me and my ideas. I drew on all my experiences, and was never afraid to be myself or to take responsibility. With the players. With the staff. With the media. And with all the people I met in Swansea. It's the only way I know."