The north London outfit's 4-2 loss to Manchester City saw them concede their 10th goal in five games, and they have won just one of those fixtures.
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Spurs went in at half-time 2-0 up at the Etihad, but managed to concede four goals after the break - and Redknapp has admitted he's not sure where Spurs go from here under Conte.
"I mean I looked at the team last night, look at the team on paper it's a strong looking team again," the ex-Spurs boss told talkSPORT Breakfast the morning after the game.
"You've got a World Cup winner at centre-half, a goalkeeper who's having a bad time but is a World Cup winner as well. You've got the best centre-forward around in Harry Kane.
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"You've got [Rodrigo] Bentancur back and it looked a good team. At half-time at 2-0 I thought worst thing that can happen is we get a point here, I couldn't see Man City getting more than two goals."
When asked about his long-term future at the club after the game, Conte told talkSPORT: "This is a question that I don't like to answer."
And Redknapp suggested Conte - who has been at the club for just over a year - may not be Spurs manager for much longer.
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"After the game you listen to Conte and it's all doom and gloom," he said.
"I don't know where you go, really, I don't know how long it's going to last here to be honest with you."
When asked if Conte needed to change to a flat back-four, rather than persist with the back-three that saw them leak four goals in 45 minutes, Redknapp was still unsure how the Spurs boss could switch it up anymore.
"When you look back at Conte and Juventus and Chelsea, he played with three at the back, it's a system he likes," he said.
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"Last night they were quite well set up to play that way with three at the back and [Ivan] Perisic can play that left wing-back role. But it is a problem when you stick him out there against [Riyad] Mahrez.
"When you stick a left winger out there to defend against a right winger who can do stuff, it was a big problem for him last night.
"But I don't know, I mean he's chopped and changed his system, he's got all his players back now, Richarlison on the bench.
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"They keep saying they need a new right-back, how many right-backs do they want to buy?
"They brought in [Matt] Doherty, they brought in Emerson Royal. They keep bringing in different right backs and they can't find the answer, it's obvious the recruitment needs to be looked at."