My point was Mihawk stopped the fight before it could finish by showing up and destroying Kriegs boat. Kriegs not weak either I think he was just arrogant, they said his spear weighed 1 ton and if he is Sai's dad then he must have left seeing as he's a pirate so that could explain why he isn't at their level, then living in the East Blue with his cape and all, as his crew said, having never been hit he grew complacent. Krieg was someone who was shown to rely on tools for his power, if after his defeat he went back to Happo he may have started training. Not for nothing either but they did imply Mihawk was hunting Krieg which should count for something, any shichibukai could have been sent unless it was personal for Mihawk.