The Spurs manager famously said at the time that "my missus could have scored it".
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"I criticised a few of the players and it really doesn't work for me, it's not really the way I manage.
"I get more out of the players by telling them what they can do rather than what they can't do. That has always been my way. They responded [but] I felt that was a mistake on my part. I felt I rectified that and lifted them and we've gone on from there."
Bent has scored 17 goals this season but he has still been linked with a move away from Spurs in the summer, with Redknapp said to be looking at Kenwyne Jones and Roque Santa Cruz.
Former Charlton striker Bent is among the players that are not automatically guaranteed a starting place – but Redknapp feels competition is healthy and his club is the place to be for those outside the top four.
"I think this is the club to play at, there are only the top four, other than that they couldn't do any better than Tottenham," he added.
"I'd stay and fight for my place. It's a club going places and we could have a great season next year. It's a squad capable of pushing the top four.
"We need a few new additions in a couple of areas. They are the areas I want to improve."
Deportivo de La Coruna's Canadian midfielder Julian de Guzman claims Spurs are monitoring him.
"I know they have been watching me in games, but I haven't spoken with anyone," he said.