It wasn't melee's over damaging because a single thf came into the fight with no prior hate on JoL and hit for 0 damage and caused hate to go insane.
This just doesn't make sense unless the thief used accomplice before, the whole story isnt there and we cant see the logs so I'm just going to choose to believe that a thief entering a fight for the first time won't take hate from plds with 1 swing. Could be wrong, but that would be good as maybe we'd learn something new.
I think your problem is you need a co-tank, how come you only use 1 tank...