Football goes through cycles and at the moment the Guardiola school is what's in demand.Big clubs don’t care about style of football that much. Man City, Barcelona and maybe Assna aside, all other big clubs have had more defensive managers in recent years.
Take something like pressing, pretty much all top managers have their teams press high up the pitch to win the ball back. It's easier to defend this way when the opponent isn't in your own half.
Conte doesn't do that because it doesn't fit with his footballing identity. There might be a few moments where his teams press but it isn't part of the identity of his teams. He dominated the Prem in his first season, but when Pep built his team it surpassed Conte's from the season before.
At this point in time, his philosophy isn't in demand at the big clubs. So he'll have to settle for clubs a tier below that. Those clubs won't be able to spend the amount of money that he wants. Conte will probably want a big wage as well. He also isn't very professional which fans might view as refreshing but isn't viewed very positively by the people who employ him.