It doesn't matter, the people against him because he isn't Ten Hag or some other "small name" that looks to be on the up will never change their minds. Which is fine, they have their belief of who the best replacement of the club is.
"The best ability is availability" - Brian Dawkins . None of the other managers are available, our choices are limited because the club and fan base didn't push out Ole despite lowering expectation for him every season. Conte is the best option left and if it fails we'll just be in the same situation we are in 7 months. Not much difference.
IMO Conte is currently a no brainer. He directly addresses very quickly our problem of being horrendously under coached and a mess defensively. It instantly improves our results on the season and brings consistency, and has us compete for trophies. This season. No other manager coming in would I say we would instantly compete for trophies. He's available, others are not (or would require bigger pay outs, which is always a factor). He's a proven manager across multiple leagues, which only applies to him.
People want Ten Hag, I get it, Ajax look great. Ajax always look great. Frank De Boer won the title 4 years in a row there when he took over. Ajax has a lot of factors at play behind them as to why they always play great football. Those don't exist at United. People can shout at the sky all day about saying we need this and that, and that Glazers need replacing, Woodward needs to go asap and replaced with Van der Sar or whatever romantic appointment... but that's not happening. So let's deal in reality here. What manager can come in, and be the most successful despite the board/structure. Sir Alex was dominant despite it. Because that's the question. What manager can come in, and make up for the structural issues we have, or make them seem not so problematic by just getting top players, with a year on year high transfer spend, and a year on year high wage budget, to play successful football. That is literally the only question that is being asked. And the answer, IMO, is unequivocally Antonio Conte is currently that guy. It's low risk, it's high reward. It's so low risk that he's the type that will actually just walk when he doesn't like a situation too. So it's a no brainer.