vague statement i know, but just about all of Hayate's leave him at negative advantage. The only one that doesn't comes off of a hi counter launch or full threshold launch, fml.
That's not entirely true. A mid wake up kick can catch his back flip at tip range. Don't get me wrong, it'll completely crush a low kick but the wind dash cancel from that won't be quick enough and more importantly, the recovery on the naked flip is too much for anything.