Me neither, but I may not have been playing on hard difficulty, but I probably was. Dodge. explosives, max research, and hypnotize in a pinch worked for me. SportBoost Tonics are great for increasing your speed to outmaneuver them.

ALSO: try "indirect" methods. Secuirty Bullesye and hacked bots, booby traps, etc…

ALSO electric buck from the shotgun is maybe the best ammo against them since it stuns them momentarily.