Your guards are playing tired. You have the depth, use it. Are you practicing press? If so, stop it. Stick to one defense. Do you have something against recruiting SF and PFs? You're playing a SG at the 3 and playing a 3-2 zone which means you'll get out rebounded by superior teams. And since you have no inside scoring game, you have a one sided offense that your opponent will just defend the perimeter.