Xbox very slow

[Tails]

I have the original xbox 360 and i ran great til i was playing GTA IV and i kept getting host booted meaning my xbox froze due to being flooded with packets. After being frozen like 10 times my xbox has slowed to a CRAWl. It takes 20 seconds til i can hear anyone when i join a party and like 2 minutes for a game to load. Has my xbox slowed down due to being frozen by modders so much or is it another problem? and YES i HAVE trying clearing the system cache and DIDNT DO A THING.